diff --git a/Editor/Editor/EditorLayer.cpp b/Editor/Editor/EditorLayer.cpp
index 995ba78..e98b730 100644
--- a/Editor/Editor/EditorLayer.cpp
+++ b/Editor/Editor/EditorLayer.cpp
@@ -113,8 +113,32 @@ namespace Prism
 
     void EditorLayer::OnAttach()
     {
+        // RenderPass
+        FramebufferSpecification geoFramebufferSpec;
+        geoFramebufferSpec.Width = 1280;
+        geoFramebufferSpec.Height = 720;
+        geoFramebufferSpec.Format = FramebufferFormat::RGBA16F;
+        geoFramebufferSpec.ClearColor = { 0.1f, 0.1f, 0.1f, 1.0f };
+
+        RenderPassSpecification geoRenderPassSpec;
+        geoRenderPassSpec.TargetFramebuffer = FrameBuffer::Create(geoFramebufferSpec);
+        m_GeoPass = RenderPass::Create(geoRenderPassSpec);
+
+
+        FramebufferSpecification compFramebufferSpec;
+        compFramebufferSpec.Width = 1280;
+        compFramebufferSpec.Height = 720;
+        compFramebufferSpec.Format = FramebufferFormat::RGBA8;
+        compFramebufferSpec.ClearColor = { 0.1f, 0.1f, 0.1f, 1.0f };
+
+        RenderPassSpecification compRenderPassSpec;
+        compRenderPassSpec.TargetFramebuffer = FrameBuffer::Create(compFramebufferSpec);
+        m_CompositePass = RenderPass::Create(compRenderPassSpec);
+
+        /*
         m_Framebuffer.reset(FrameBuffer::Create(1280, 720, FramebufferFormat::RGBA16F));
         m_FinalPresentBuffer.reset(FrameBuffer::Create(1280, 720, FramebufferFormat::RGBA8));
+        */
 
         m_QuadShader = Shader::Create("assets/shaders/quad.glsl");
         m_HDRShader  = Shader::Create("assets/shaders/hdr.glsl");
@@ -151,7 +175,7 @@ namespace Prism
             mi->Set("u_Roughness", roughness);
             mi->Set("u_ModelMatrix", glm::translate(glm::mat4(1.0f), glm::vec3(x, 0.0f, 0.0f)));
             x += 1.1f;
-            roughness += 0.15f;
+            roughness += 0.125f;
             m_MetalSphereMaterialInstances.push_back(mi);
         }
 
@@ -165,26 +189,17 @@ namespace Prism
             mi->Set("u_Roughness", roughness);
             mi->Set("u_ModelMatrix", translate(glm::mat4(1.0f), glm::vec3(x, 1.2f, 0.0f)));
             x += 1.1f;
-            roughness += 0.15f;
+            roughness += 0.125f;
             m_DielectricSphereMaterialInstances.push_back(mi);
         }
-        // Create Quad
-        x           = -1;
-        float y     = -1;
-        float width = 2, height = 2;
-        struct QuadVertex
-        {
-            glm::vec3 Position;
-            glm::vec2 TexCoord;
-        };
 
+        // Create Quad
         static float QuadVertex[] = {
             -1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
              1.0f, -1.0f, 0.0f, 1.0f, 0.0f,
              1.0f,  1.0f, 0.0f, 1.0f, 1.0f,
             -1.0f,  1.0f, 0.0f, 0.0f, 1.0f
         };
-
         static uint32_t QuadIndices[] = {
             0, 1, 2, 2, 3, 0
         };
@@ -225,7 +240,8 @@ namespace Prism
             m_Camera.Update(deltaTime);
             auto viewProjection = m_Camera.GetProjectionMatrix() * m_Camera.GetViewMatrix();
 
-            m_Framebuffer->Bind();
+            // m_Framebuffer->Bind();
+		    Renderer::BeginRenderPass(m_GeoPass);
             Renderer::Clear(m_ClearColor[0], m_ClearColor[1], m_ClearColor[2], m_ClearColor[3]);
 
             m_QuadShader->Bind();
@@ -252,7 +268,6 @@ namespace Prism
             m_MeshMaterial->Set("u_MetalnessTexToggle", m_MetalnessInput.UseTexture ? 1.0f : 0.0f);
             m_MeshMaterial->Set("u_RoughnessTexToggle", m_RoughnessInput.UseTexture ? 1.0f : 0.0f);
             m_MeshMaterial->Set("u_EnvMapRotation", m_EnvMapRotation);
-
             m_MeshMaterial->Set("u_EnvRadianceTex", m_EnvironmentCubeMap);
             m_MeshMaterial->Set("u_EnvIrradianceTex", m_EnvironmentIrradiance);
             m_MeshMaterial->Set("u_BRDFLUTTexture", m_BRDFLUT);
@@ -317,19 +332,23 @@ namespace Prism
             m_GridMaterial->Set("u_MVP", viewProjection * glm::scale(glm::mat4(1.0f), glm::vec3(16.0f)));
             m_PlaneMesh->Render(deltaTime, m_GridMaterial);
 
-            m_Framebuffer->Unbind();
+            // m_Framebuffer->Unbind();
+            Renderer::EndRenderPass();
 
-            m_FinalPresentBuffer->Bind();
+		    Renderer::BeginRenderPass(m_CompositePass);
+            // m_FinalPresentBuffer->Bind();
             m_HDRShader->Bind();
             m_HDRShader->SetFloat("u_Exposure", m_Exposure);
-            m_Framebuffer->BindTexture();
+            // m_Framebuffer->BindTexture();
+		    m_GeoPass->GetSpecification().TargetFramebuffer->BindTexture();
             /*
             m_VertexBuffer->Bind();
             m_IndexBuffer->Bind();
             */
             m_FullscreenQuadVertexArray->Bind();
             Renderer::DrawIndexed(m_FullscreenQuadVertexArray->GetIndexBuffer()->GetCount(), false);
-            m_FinalPresentBuffer->Unbind();
+            // m_FinalPresentBuffer->Unbind();
+		    Renderer::EndRenderPass();
         }
     }
 
@@ -681,10 +700,15 @@ namespace Prism
         ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0, 0));
         ImGui::Begin("Viewport");
         auto viewportSize = ImGui::GetContentRegionAvail();
-        m_Framebuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
-        m_FinalPresentBuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
+
+        m_GeoPass->GetSpecification().TargetFramebuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
+        m_CompositePass->GetSpecification().TargetFramebuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
+
+        // m_Framebuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
+        // m_FinalPresentBuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
         m_Camera.SetProjectionMatrix(glm::perspectiveFov(glm::radians(45.0f), viewportSize.x, viewportSize.y, 0.1f, 10000.0f));
-        ImGui::Image((ImTextureRef)m_FinalPresentBuffer->GetColorAttachmentRendererID(), viewportSize, {0, 1}, {1, 0});
+        // ImGui::Image((ImTextureRef)m_FinalPresentBuffer->GetColorAttachmentRendererID(), viewportSize, {0, 1}, {1, 0});
+        ImGui::Image((ImTextureRef)m_CompositePass->GetSpecification().TargetFramebuffer->GetColorAttachmentRendererID(), viewportSize, { 0, 1 }, { 1, 0 });
 
         // ImGuizmo
         if (m_GizmoType != -1)
diff --git a/Editor/Editor/EditorLayer.h b/Editor/Editor/EditorLayer.h
index 1ac23cb..d906c10 100644
--- a/Editor/Editor/EditorLayer.h
+++ b/Editor/Editor/EditorLayer.h
@@ -27,7 +27,8 @@ private:
 private:
     float m_ClearColor[4];
 
-    Ref<FrameBuffer> m_Framebuffer, m_FinalPresentBuffer;
+    // Ref<FrameBuffer> m_Framebuffer, m_FinalPresentBuffer;
+    Ref<RenderPass> m_GeoPass, m_CompositePass;
 
     /*
     Ref<VertexBuffer> m_VertexBuffer;
diff --git a/Prism/src/Prism.h b/Prism/src/Prism.h
index 298f21f..8c966ea 100644
--- a/Prism/src/Prism.h
+++ b/Prism/src/Prism.h
@@ -18,6 +18,7 @@
 
 #include "Prism/Renderer/Buffer.h"
 #include "Prism/Renderer/Renderer.h"
+#include "Prism/Renderer/RenderPass.h"
 #include "Prism/Renderer/Shader.h"
 #include "Prism/Renderer/Texture.h"
 #include "Prism/Renderer/FrameBuffer.h"
diff --git a/Prism/src/Prism/Core/Application.cpp b/Prism/src/Prism/Core/Application.cpp
index 861a9ac..b9eb4a2 100644
--- a/Prism/src/Prism/Core/Application.cpp
+++ b/Prism/src/Prism/Core/Application.cpp
@@ -181,7 +181,7 @@ namespace Prism
 
     bool Application::OnWindowResize(const WindowResizeEvent& e)
     {
-        int width = e.GetWidth(), height = e.GetHeight();
+        uint32_t width = e.GetWidth(), height = e.GetHeight();
         if (width == 0 || height == 0)
         {
             m_Minimized = true;
@@ -192,7 +192,10 @@ namespace Prism
         PM_RENDER_2(width, height, { glViewport(0, 0, width, height); });
         auto& fbs = FrameBufferPool::GetGlobal()->GetAll();
         for (auto& fb : fbs)
-            fb->Resize(width, height);
+        {
+            if (const auto fbp = fb.lock())
+                fbp->Resize(width, height);
+        }
         return false;
     }
 
diff --git a/Prism/src/Prism/Platform/OpenGL/OpenGLFrameBuffer.cpp b/Prism/src/Prism/Platform/OpenGL/OpenGLFrameBuffer.cpp
index ac84674..3e70722 100644
--- a/Prism/src/Prism/Platform/OpenGL/OpenGLFrameBuffer.cpp
+++ b/Prism/src/Prism/Platform/OpenGL/OpenGLFrameBuffer.cpp
@@ -10,14 +10,13 @@
 
 namespace Prism
 {
-    OpenGLFrameBuffer::OpenGLFrameBuffer(const uint32_t width, const uint32_t height, const FramebufferFormat format)
-        : m_Format(format)
+    OpenGLFrameBuffer::OpenGLFrameBuffer(const FramebufferSpecification& spec)
+        : m_Specification(spec)
     {
-        OpenGLFrameBuffer::Resize(width, height);
-        m_Width = width;
-        m_Height = height;
+        OpenGLFrameBuffer::Resize(spec.Width, spec.Height);
     }
 
+
     OpenGLFrameBuffer::~OpenGLFrameBuffer()
     {
         PM_RENDER_S({
@@ -29,7 +28,7 @@ namespace Prism
     {
         PM_RENDER_S({
             glBindFramebuffer(GL_FRAMEBUFFER, self->m_RendererID);
-            glViewport(0, 0, self->m_Width, self->m_Height);
+            glViewport(0, 0, self->m_Specification.Width, self->m_Specification.Height);
         });
     }
 
@@ -40,13 +39,13 @@ namespace Prism
         });
     }
 
-    void OpenGLFrameBuffer::Resize(uint32_t width, uint32_t height)
+    void OpenGLFrameBuffer::Resize(const uint32_t width, const uint32_t height)
     {
-        if (m_Width == width && m_Height == height)
+        if (m_RendererID && m_Specification.Width == width && m_Specification.Height == height)
             return;
 
-        m_Width = width;
-        m_Height = height;
+        m_Specification.Width = width;
+        m_Specification.Height = height;
         PM_RENDER_S({
             if (self->m_RendererID)
             {
@@ -62,13 +61,13 @@ namespace Prism
             glBindTexture(GL_TEXTURE_2D, self->m_ColorAttachment);
 
             // TODO: Create Hazel texture object based on format here
-            if (self->m_Format == FramebufferFormat::RGBA16F)
+            if (self->m_Specification.Format == FramebufferFormat::RGBA16F)
             {
-                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, self->m_Width, self->m_Height, 0, GL_RGBA, GL_FLOAT, nullptr);
+                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, self->m_Specification.Width, self->m_Specification.Height, 0, GL_RGBA, GL_FLOAT, nullptr);
             }
-            else if (self->m_Format == FramebufferFormat::RGBA8)
+            else if (self->m_Specification.Format == FramebufferFormat::RGBA8)
             {
-                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, self->m_Width, self->m_Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
+                glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, self->m_Specification.Width, self->m_Specification.Height, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
             }
             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
             glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
@@ -77,7 +76,7 @@ namespace Prism
             glGenTextures(1, &self->m_DepthAttachment);
             glBindTexture(GL_TEXTURE_2D, self->m_DepthAttachment);
             glTexImage2D(
-                GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, self->m_Width, self->m_Height, 0,
+                GL_TEXTURE_2D, 0, GL_DEPTH24_STENCIL8, self->m_Specification.Width, self->m_Specification.Height, 0,
                 GL_DEPTH_STENCIL, GL_UNSIGNED_INT_24_8, NULL
             );
 
diff --git a/Prism/src/Prism/Platform/OpenGL/OpenGLFrameBuffer.h b/Prism/src/Prism/Platform/OpenGL/OpenGLFrameBuffer.h
index dbe4b42..59826a5 100644
--- a/Prism/src/Prism/Platform/OpenGL/OpenGLFrameBuffer.h
+++ b/Prism/src/Prism/Platform/OpenGL/OpenGLFrameBuffer.h
@@ -12,7 +12,7 @@ namespace Prism
     class OpenGLFrameBuffer : public FrameBuffer
     {
     public:
-        OpenGLFrameBuffer(uint32_t width, uint32_t height, FramebufferFormat format);
+        OpenGLFrameBuffer(const FramebufferSpecification& spec);
         virtual ~OpenGLFrameBuffer();
 
         void Bind() const override;
@@ -26,15 +26,13 @@ namespace Prism
         RendererID GetColorAttachmentRendererID() const override { return m_ColorAttachment; }
         RendererID GetDepthAttachmentRendererID() const override { return m_DepthAttachment; }
 
-        virtual uint32_t GetWidth() const { return m_Width; }
-        virtual uint32_t GetHeight() const { return m_Height; }
-        virtual FramebufferFormat GetFormat() const { return m_Format; }
+        virtual const FramebufferSpecification& GetSpecification() const override { return m_Specification; }
     private:
-        RendererID m_RendererID = 0;
-        uint32_t m_Width = 0, m_Height = 0;
-        FramebufferFormat m_Format;
+        FramebufferSpecification m_Specification;
 
-        RendererID m_ColorAttachment, m_DepthAttachment;
+        RendererID m_RendererID = 0;
+
+        RendererID m_ColorAttachment = 0, m_DepthAttachment = 0;
     };
 }
 
diff --git a/Prism/src/Prism/Platform/OpenGL/OpenGLRenderPass.cpp b/Prism/src/Prism/Platform/OpenGL/OpenGLRenderPass.cpp
new file mode 100644
index 0000000..ea5826d
--- /dev/null
+++ b/Prism/src/Prism/Platform/OpenGL/OpenGLRenderPass.cpp
@@ -0,0 +1,17 @@
+//
+// Created by sfd on 25-11-29.
+//
+
+#include "OpenGLRenderPass.h"
+
+namespace Prism
+{
+    OpenGLRenderPass::OpenGLRenderPass(const RenderPassSpecification& spec)
+        : m_spec(spec)
+    {
+    }
+
+    OpenGLRenderPass::~OpenGLRenderPass()
+    {
+    }
+}
diff --git a/Prism/src/Prism/Platform/OpenGL/OpenGLRenderPass.h b/Prism/src/Prism/Platform/OpenGL/OpenGLRenderPass.h
new file mode 100644
index 0000000..d5661c0
--- /dev/null
+++ b/Prism/src/Prism/Platform/OpenGL/OpenGLRenderPass.h
@@ -0,0 +1,26 @@
+//
+// Created by sfd on 25-11-29.
+//
+
+#ifndef OPENGLRENDERPASS_H
+#define OPENGLRENDERPASS_H
+#include "Prism/Renderer/RenderPass.h"
+
+
+namespace Prism
+{
+    class OpenGLRenderPass : public RenderPass
+    {
+    public:
+        OpenGLRenderPass(const RenderPassSpecification& spec);
+        virtual ~OpenGLRenderPass();
+
+        virtual const RenderPassSpecification& GetSpecification() const override { return m_spec; }
+
+    private:
+        RenderPassSpecification m_spec;
+    };
+}
+
+
+#endif //OPENGLRENDERPASS_H
diff --git a/Prism/src/Prism/Renderer/FrameBuffer.cpp b/Prism/src/Prism/Renderer/FrameBuffer.cpp
index 1ba318d..eb60510 100644
--- a/Prism/src/Prism/Renderer/FrameBuffer.cpp
+++ b/Prism/src/Prism/Renderer/FrameBuffer.cpp
@@ -8,13 +8,13 @@
 
 namespace Prism
 {
-    FrameBuffer* FrameBuffer::Create(uint32_t width, uint32_t height, FramebufferFormat format)
+    Ref<FrameBuffer> FrameBuffer::Create(const FramebufferSpecification& spec)
     {
-        FrameBuffer* result = nullptr;
+        Ref<FrameBuffer> result = nullptr;
         switch (RendererAPI::Current())
         {
         case RendererAPIType::None:		return nullptr;
-        case RendererAPIType::OpenGL:	result = new OpenGLFrameBuffer(width, height, format);
+        case RendererAPIType::OpenGL:	result = CreateRef<OpenGLFrameBuffer>(spec);
         }
         FrameBufferPool::GetGlobal()->Add(result);
         return result;
@@ -39,7 +39,12 @@ namespace Prism
 		return std::weak_ptr<FrameBuffer>();
 	}
 
-	void FrameBufferPool::Add(FrameBuffer* framebuffer)
+	FrameBufferPool* FrameBufferPool::GetGlobal()
+	{
+		return s_Instance;
+	}
+
+	void FrameBufferPool::Add(std::weak_ptr<FrameBuffer> framebuffer)
 	{
 		m_Pool.push_back(framebuffer);
 	}
diff --git a/Prism/src/Prism/Renderer/FrameBuffer.h b/Prism/src/Prism/Renderer/FrameBuffer.h
index d2d3efd..8bf5eda 100644
--- a/Prism/src/Prism/Renderer/FrameBuffer.h
+++ b/Prism/src/Prism/Renderer/FrameBuffer.h
@@ -5,6 +5,7 @@
 #ifndef FRAMEBUFFER_H
 #define FRAMEBUFFER_H
 #include "RendererAPI.h"
+#include "glm/glm.hpp"
 
 
 namespace Prism
@@ -16,12 +17,25 @@ namespace Prism
         RGBA16F = 2
     };
 
+    struct FramebufferSpecification
+    {
+        uint32_t Width = 1280;
+        uint32_t Height = 720;
+        glm::vec4 ClearColor;
+        FramebufferFormat Format;
+
+        // SwapChainTarget = screen buffer (i.e. no framebuffer)
+        bool SwapChainTarget = false;
+    };
+
     class PRISM_API FrameBuffer
     {
     public:
-        static FrameBuffer* Create(uint32_t width, uint32_t height, FramebufferFormat format);
-
         virtual ~FrameBuffer() {}
+
+        static Ref<FrameBuffer> Create(const FramebufferSpecification& spec);
+
+		virtual const FramebufferSpecification& GetSpecification() const = 0;
         virtual void Bind() const = 0;
         virtual void Unbind() const = 0;
 
@@ -41,13 +55,14 @@ namespace Prism
         ~FrameBufferPool();
 
         std::weak_ptr<FrameBuffer> AllocateBuffer();
-        void Add(FrameBuffer* framebuffer);
+        void Add(std::weak_ptr<FrameBuffer> framebuffer);
 
-        const std::vector<FrameBuffer*>& GetAll() const { return m_Pool; }
+        const std::vector<std::weak_ptr<FrameBuffer>>& GetAll() const { return m_Pool; }
+
+        static FrameBufferPool* GetGlobal();
 
-        inline static FrameBufferPool* GetGlobal() { return s_Instance; }
     private:
-        std::vector<FrameBuffer*> m_Pool;
+        std::vector<std::weak_ptr<FrameBuffer>> m_Pool;
 
         static FrameBufferPool* s_Instance;
     };
diff --git a/Prism/src/Prism/Renderer/Mesh.cpp b/Prism/src/Prism/Renderer/Mesh.cpp
index ffb03ad..ba9ddc0 100644
--- a/Prism/src/Prism/Renderer/Mesh.cpp
+++ b/Prism/src/Prism/Renderer/Mesh.cpp
@@ -317,8 +317,8 @@ namespace Prism
                     }
                 }
 
-                if (!materialOverride)
-                    self->m_MeshShader->SetMat4FromRenderThread("u_ModelMatrix", transform * submesh.Transform);
+                // if (!materialOverride)
+                //     self->m_MeshShader->SetMat4FromRenderThread("u_ModelMatrix", transform * submesh.Transform);
                 glDrawElementsBaseVertex(GL_TRIANGLES, submesh.IndexCount, GL_UNSIGNED_INT, (void*)(sizeof(uint32_t) * submesh.BaseIndex), submesh.BaseVertex);
             }
 
diff --git a/Prism/src/Prism/Renderer/RenderPass.cpp b/Prism/src/Prism/Renderer/RenderPass.cpp
new file mode 100644
index 0000000..f9b2bfd
--- /dev/null
+++ b/Prism/src/Prism/Renderer/RenderPass.cpp
@@ -0,0 +1,22 @@
+//
+// Created by sfd on 25-11-29.
+//
+
+#include "RenderPass.h"
+
+#include "Prism/Platform/OpenGL/OpenGLRenderPass.h"
+
+namespace Prism
+{
+    Ref<RenderPass> RenderPass::Create(const RenderPassSpecification& spec)
+    {
+        switch (RendererAPI::Current())
+        {
+        case RendererAPIType::None:    PM_CORE_ASSERT(false, "RendererAPI::None is currently not supported!"); return nullptr;
+        case RendererAPIType::OpenGL:  return std::make_shared<OpenGLRenderPass>(spec);
+        }
+
+        PM_CORE_ASSERT(false, "Unknown RendererAPI!");
+        return nullptr;
+    }
+}
diff --git a/Prism/src/Prism/Renderer/RenderPass.h b/Prism/src/Prism/Renderer/RenderPass.h
new file mode 100644
index 0000000..b63c4df
--- /dev/null
+++ b/Prism/src/Prism/Renderer/RenderPass.h
@@ -0,0 +1,29 @@
+//
+// Created by sfd on 25-11-29.
+//
+
+#ifndef RENDERPASS_H
+#define RENDERPASS_H
+#include "FrameBuffer.h"
+
+
+namespace Prism
+{
+    struct RenderPassSpecification
+    {
+        Ref<FrameBuffer> TargetFramebuffer;
+    };
+
+    class PRISM_API RenderPass
+    {
+    public:
+        virtual ~RenderPass() {}
+
+        virtual const RenderPassSpecification& GetSpecification() const = 0;
+
+        static Ref<RenderPass> Create(const RenderPassSpecification& spec);
+    };
+}
+
+
+#endif //RENDERPASS_H
diff --git a/Prism/src/Prism/Renderer/Renderer.cpp b/Prism/src/Prism/Renderer/Renderer.cpp
index bcd7c44..c82b211 100644
--- a/Prism/src/Prism/Renderer/Renderer.cpp
+++ b/Prism/src/Prism/Renderer/Renderer.cpp
@@ -52,4 +52,38 @@ namespace Prism
     {
         s_Instance->m_CommandQueue.Execute();
     }
+
+    void Renderer::BeginRenderPass(const Ref<RenderPass>& renderPass)
+    {
+        s_Instance->IBeginRenderPass(renderPass);
+    }
+
+    void Renderer::EndRenderPass()
+    {
+        s_Instance->IEndRenderPass();
+    }
+
+    void Renderer::SubmitMesh(const Ref<Mesh>& mesh)
+    {
+        s_Instance->SubmitMeshI(mesh);
+    }
+
+    void Renderer::IBeginRenderPass(const Ref<RenderPass>& renderPass)
+    {
+        // TODO: Convert all of this into a render command buffer
+        m_ActiveRenderPass = renderPass;
+
+        renderPass->GetSpecification().TargetFramebuffer->Bind();
+    }
+
+    void Renderer::IEndRenderPass()
+    {
+        PM_CORE_ASSERT(m_ActiveRenderPass, "No active render pass! Have you called Renderer::EndRenderPass twice?");
+        m_ActiveRenderPass->GetSpecification().TargetFramebuffer->Unbind();
+        m_ActiveRenderPass = nullptr;
+    }
+
+    void Renderer::SubmitMeshI(const Ref<Mesh>& mesh)
+    {
+    }
 }
diff --git a/Prism/src/Prism/Renderer/Renderer.h b/Prism/src/Prism/Renderer/Renderer.h
index a781a88..8ba42c1 100644
--- a/Prism/src/Prism/Renderer/Renderer.h
+++ b/Prism/src/Prism/Renderer/Renderer.h
@@ -4,7 +4,9 @@
 
 #ifndef RENDERER_H
 #define RENDERER_H
+#include "Mesh.h"
 #include "RenderCommandQueue.h"
+#include "RenderPass.h"
 #include "Shader.h"
 #include "Prism/Core/Application.h"
 
@@ -36,10 +38,25 @@ namespace Prism
         void WaitAndRender();
         inline static Renderer& Get() { return *s_Instance; }
 
+
+    public:
+    	static void BeginRenderPass(const Ref<RenderPass>& renderPass);
+        static void EndRenderPass();
+
+        static void SubmitMesh(const Ref<Mesh>& mesh);
+
+    private:
+    	void IBeginRenderPass(const Ref<RenderPass>& renderPass);
+    	void IEndRenderPass();
+
+    	void SubmitMeshI(const Ref<Mesh>& mesh);
+
+
     private:
         static Renderer* s_Instance;
+    private:
+		Ref<RenderPass> m_ActiveRenderPass;
     	Scope<ShaderLibrary> m_ShaderLibrary;
-
         RenderCommandQueue m_CommandQueue;
     };
 
diff --git a/Sandbox/Sandbox/Layer/TestLayer.cpp b/Sandbox/Sandbox/Layer/TestLayer.cpp
index 9d88bf0..260b65f 100644
--- a/Sandbox/Sandbox/Layer/TestLayer.cpp
+++ b/Sandbox/Sandbox/Layer/TestLayer.cpp
@@ -148,8 +148,26 @@ TestLayer::TestLayer()
 
 void TestLayer::OnAttach()
 {
-    m_FrameBuffer.reset(Prism::FrameBuffer::Create(1280, 720, Prism::FramebufferFormat::RGBA16F));
-    m_FinalPresentBuffer.reset(Prism::FrameBuffer::Create(1280, 720, Prism::FramebufferFormat::RGBA8));
+    Prism::FramebufferSpecification geoFramebufferspec;
+    geoFramebufferspec.Width = 1280;
+    geoFramebufferspec.Height = 720;
+    geoFramebufferspec.Format = Prism::FramebufferFormat::RGBA16F;
+    geoFramebufferspec.ClearColor = {0.1f, 0.1f, 0.1f, 1.0f};
+
+    Prism::RenderPassSpecification geoRenderPass;
+    geoRenderPass.TargetFramebuffer = Prism::FrameBuffer::Create(geoFramebufferspec);
+    m_GeoPass = Prism::RenderPass::Create(geoRenderPass);
+
+    Prism::FramebufferSpecification finalFramebufferspec;
+    finalFramebufferspec.Width = 1280;
+    finalFramebufferspec.Height = 720;
+    finalFramebufferspec.Format = Prism::FramebufferFormat::RGBA8;
+    finalFramebufferspec.ClearColor = {0.1f, 0.1f, 0.1f, 1.0f};
+
+    Prism::RenderPassSpecification finalRenderPass;
+    finalRenderPass.TargetFramebuffer = Prism::FrameBuffer::Create(finalFramebufferspec);
+    m_FinalPass = Prism::RenderPass::Create(finalRenderPass);
+
 
     static float QuadVertex[] = {
         -1.0f, -1.0f, 0.0f, 0.0f, 0.0f,
@@ -174,13 +192,18 @@ void TestLayer::OnAttach()
     m_VertexArray->SetIndexBuffer(ib);
 
     m_SkyBoxTextureCube.reset(Prism::TextureCube::Create("assets/textures/environments/Arches_E_PineTree_Radiance.tga"));
+    m_EnvironmentIrradiance.reset(Prism::TextureCube::Create("assets/textures/environments/Arches_E_PineTree_Irradiance.tga"));
 
-    m_SkyboxShader = Prism::Shader::Create("assets/shaders/quad.glsl");
-    m_Shader = Prism::Shader::Create("assets/shaders/demo.glsl");
+    m_SkyBoxShader = Prism::Shader::Create("assets/shaders/quad.glsl");
     m_HDRShader = Prism::Shader::Create("assets/shaders/hdr.glsl");
 
-    // m_Mesh = std::make_unique<Prism::Mesh>("assets/meshes/cerberus.fbx");
-    // m_MeshMaterial = Prism::CreateRef<Prism::MaterialInstance>(m_Mesh->GetMaterial());
+    m_Mesh = std::make_unique<Prism::Mesh>("assets/models/m1911/m1911.fbx");
+    m_MeshMaterial = Prism::CreateRef<Prism::MaterialInstance>(m_Mesh->GetMaterial());
+
+    m_BRDFLUT.reset(Prism::Texture2D::Create("assets/textures/BRDF_LUT.tga"));
+
+    m_Light.Direction = {-0.5f, -0.5f, 1.0f};
+    m_Light.Radiance  = {1.0f, 1.0f, 1.0f};
 }
 
 void TestLayer::OnDetach()
@@ -193,26 +216,47 @@ void TestLayer::OnUpdate(Prism::TimeStep deltaTime)
     m_Camera.Update(deltaTime);
     auto viewProjection = m_Camera.GetProjectionMatrix() * m_Camera.GetViewMatrix();
 
-    m_FrameBuffer->Bind();
+    Prism::Renderer::BeginRenderPass(m_GeoPass);
     Prism::Renderer::Clear(m_clearColor[0], m_clearColor[1], m_clearColor[2], m_clearColor[3]);
 
     // SkyBox
-    m_SkyboxShader->Bind();
-    m_SkyboxShader->SetMat4("u_InverseVP", inverse(viewProjection));
+    m_SkyBoxShader->Bind();
+    m_SkyBoxShader->SetMat4("u_InverseVP", inverse(viewProjection));
     m_SkyBoxTextureCube->Bind(0);
     m_VertexArray->Bind();
     Prism::Renderer::DrawIndexed(m_VertexArray->GetIndexBuffer()->GetCount(), false);
 
-    m_FrameBuffer->Unbind();
+
+    m_MeshMaterial->Set("u_AlbedoColor", m_AlbedoInput.Color);
+    m_MeshMaterial->Set("u_Metalness", m_MetalnessInput.Value);
+    m_MeshMaterial->Set("u_Roughness", m_RoughnessInput.Value);
+    m_MeshMaterial->Set("u_ViewProjectionMatrix", viewProjection);
+    m_MeshMaterial->Set("u_ModelMatrix", glm::scale(glm::mat4(1.0f), glm::vec3(m_MeshScale)));
+    m_MeshMaterial->Set("lights", m_Light);
+    m_MeshMaterial->Set("u_CameraPosition", m_Camera.GetPosition());
+    m_MeshMaterial->Set("u_RadiancePrefilter", m_RadiancePrefilter ? 1.0f : 0.0f);
+    m_MeshMaterial->Set("u_AlbedoTexToggle", m_AlbedoInput.UseTexture ? 1.0f : 0.0f);
+    m_MeshMaterial->Set("u_NormalTexToggle", m_NormalInput.UseTexture ? 1.0f : 0.0f);
+    m_MeshMaterial->Set("u_MetalnessTexToggle", m_MetalnessInput.UseTexture ? 1.0f : 0.0f);
+    m_MeshMaterial->Set("u_RoughnessTexToggle", m_RoughnessInput.UseTexture ? 1.0f : 0.0f);
+    m_MeshMaterial->Set("u_EnvMapRotation", m_EnvMapRotation);
+    m_MeshMaterial->Set("u_EnvRadianceTex", m_SkyBoxTextureCube);
+    m_MeshMaterial->Set("u_EnvIrradianceTex", m_EnvironmentIrradiance);
+    m_MeshMaterial->Set("u_BRDFLUTTexture", m_BRDFLUT);
+
+    m_Mesh->Render(deltaTime, glm::mat4(1.0f), m_MeshMaterial);
+
+    Prism::Renderer::EndRenderPass();
 
 
     // HDR
-    m_FinalPresentBuffer->Bind();
+    Prism::Renderer::BeginRenderPass(m_FinalPass);
     m_HDRShader->Bind();
 	m_HDRShader->SetFloat("u_Exposure", m_Exposure);
-    m_FrameBuffer->BindTexture();
+    m_GeoPass->GetSpecification().TargetFramebuffer->BindTexture();
+    m_VertexArray->Bind();
     Prism::Renderer::DrawIndexed(m_VertexArray->GetIndexBuffer()->GetCount(), false);
-    m_FinalPresentBuffer->Unbind();
+    Prism::Renderer::EndRenderPass();
 }
 
 void TestLayer::OnImGuiRender()
@@ -225,16 +269,18 @@ void TestLayer::OnImGuiRender()
     ImGui::DragFloat("Exposure", &m_Exposure, 0.01f, 0.0f);
     const auto& position = m_Camera.GetPosition();
     ImGui::Text("Camera: (%.2f, %.2f, %.2f)", position.x, position.y, position.z);
+
+
     ImGui::End();
 
 
     ImGui::PushStyleVar(ImGuiStyleVar_WindowPadding, ImVec2(0.0f, 0.0f));
     ImGui::Begin("Viewport");
     auto viewportSize = ImGui::GetContentRegionAvail();
-    m_FrameBuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
-    m_FinalPresentBuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
+    m_GeoPass->GetSpecification().TargetFramebuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
+    m_FinalPass->GetSpecification().TargetFramebuffer->Resize((uint32_t)viewportSize.x, (uint32_t)viewportSize.y);
     m_Camera.SetProjectionMatrix(glm::perspectiveFov(glm::radians(45.0f), viewportSize.x, viewportSize.y, 0.1f, 10000.0f));
-    ImGui::Image((ImTextureRef)m_FinalPresentBuffer->GetColorAttachmentRendererID(), viewportSize, {0, 1}, {1, 0});
+    ImGui::Image((ImTextureRef)m_FinalPass->GetSpecification().TargetFramebuffer->GetColorAttachmentRendererID(), viewportSize, {0, 1}, {1, 0});
     ImGui::End();
     ImGui::PopStyleVar();
 }
diff --git a/Sandbox/Sandbox/Layer/TestLayer.h b/Sandbox/Sandbox/Layer/TestLayer.h
index 460cb40..63c16b8 100644
--- a/Sandbox/Sandbox/Layer/TestLayer.h
+++ b/Sandbox/Sandbox/Layer/TestLayer.h
@@ -10,6 +10,7 @@
 #include "Prism/Renderer/Camera.h"
 #include "Prism/Renderer/FrameBuffer.h"
 #include "Prism/Renderer/Mesh.h"
+#include "Prism/Renderer/RenderPass.h"
 #include "Prism/Renderer/Shader.h"
 #include "Prism/Renderer/Texture.h"
 
@@ -28,20 +29,62 @@ private:
     glm::vec4 m_clearColor = glm::vec4(0.1f, 0.1f, 0.1f, 1.0f);
     glm::vec4 m_TriangleColor = glm::vec4(1.0f);
 
-    Prism::Ref<Prism::FrameBuffer> m_FrameBuffer, m_FinalPresentBuffer;
+    Prism::Ref<Prism::RenderPass> m_GeoPass, m_FinalPass;
 
-
-    Prism::Ref<Prism::TextureCube> m_SkyBoxTextureCube;
     Prism::Ref<Prism::VertexArray> m_VertexArray;
-    Prism::Ref<Prism::Shader> m_SkyboxShader;
-    Prism::Ref<Prism::Shader> m_Shader;
-    Prism::Ref<Prism::Shader> m_HDRShader;
+    Prism::Ref<Prism::TextureCube> m_SkyBoxTextureCube, m_EnvironmentIrradiance;
+    Prism::Ref<Prism::Shader> m_HDRShader, m_SkyBoxShader;
     Prism::Ref<Prism::Mesh> m_Mesh;
     Prism::Ref<Prism::MaterialInstance> m_MeshMaterial;
+    Prism::Ref<Prism::Texture2D> m_BRDFLUT;
 
     Prism::Camera m_Camera;
 
     float m_Exposure = 1.0f;
+
+    struct AlbedoInput
+    {
+        glm::vec3 Color = { 0.972f, 0.96f, 0.915f };
+        Prism::Ref<Prism::Texture2D> TextureMap;
+        bool SRGB = true;
+        bool UseTexture = false;
+    };
+    AlbedoInput m_AlbedoInput;
+
+    struct NormalInput
+    {
+        Prism::Ref<Prism::Texture2D> TextureMap;
+        bool UseTexture = false;
+    };
+    NormalInput m_NormalInput;
+
+    struct MetalnessInput
+    {
+        float Value = 1.0f;
+        Prism::Ref<Prism::Texture2D> TextureMap;
+        bool UseTexture = false;
+    };
+    MetalnessInput m_MetalnessInput;
+
+    struct RoughnessInput
+    {
+        float Value = 0.5f;
+        Prism::Ref<Prism::Texture2D> TextureMap;
+        bool UseTexture = false;
+    };
+    RoughnessInput m_RoughnessInput;
+
+    struct Light
+    {
+        glm::vec3 Direction;
+        glm::vec3 Radiance;
+    };
+    Light m_Light;
+
+    float m_LightMultiplier = 0.3f;
+    float m_MeshScale = 1.0f;
+    bool m_RadiancePrefilter = false;
+    float m_EnvMapRotation = 0.0f;
 };