Optimizing Graphics in Unity 学习

Posted 2021-03-01 revoid

https://learn.unity.com/tutorial/optimizing-graphics-in-unity

 

1. Rendering

2. Camera

3. Textures

4. Multithreaded Rendering & Graphics Jobs

5. Framebuffer

6. Shaders

 

1. Rendering

2. Camera

　　Clear

On mobile tile-based renderers, the clear command is particularly important. Unity takes care of the details, so you only have to set the clear flags on the Camera and avoid using the "Don‘t Clear" flag when targeting mobile devices. The underlying  behavior of the clear command depends on the platform and graphics driver, but depending on the clear flag you choose, it can impact performance significantly, because Unity has to either clear the previous content, set flags to ignore the previous content, or read previous content back from the buffer. 

　　　　Clear flags

On mobile, avoid Unity‘s default Skybox (appropriately named Default-Skybox), which is computationally expensive and which is enabled by default in all new Scenes. 

　　　　Discard and Restore buffer

 

　　　　Tile-based Rendering

 

　　　　RenderTexture Switching

 

　　　　FrameBuffer Compression

 

　　Culling

 

　　　　Frustum Culling

 

　　　　Occlusion Culling

 

　　　　Multiple Cameras

 

　　　　Per-Layer culling distances

 

　　Skinned Motion Vectors

 

　　Fillrate

 

　　　　Overdarw

 

　　　　Overdraw view

 

　　　　Transparency

 

　　　　Alpha Blending

 

　　　　Draw Order

 

　　　　Z-testing

 

　　Draw Call Batching

 

　　　　Instancing

 

　　Geometry

 

　　Level of Detail (LOD)

 

　　　　Static Scenes

 

　　　　High-Quality LODs

 

　　　　Runtime Mesh Combination

 

　　　　Animation LODs

 

3. Textures

　　Asset Auditing

 

　　Texture Compression

 

　　　　ASTC

 

　　　　PVRTC

 

　　GPU Upload

 

　　　　Load Behavior

 

　　Awake Behavior

 

　　Memory Behavior

 

4. Multithreaded Rendering & Graphics Jobs

　　Singlethreaded Rendering (single client, no worker thread)

 

　　Multithreaded Rendering (single client,  single worker thread)

 

　　　　Renderthread

 

　　　　Availability

 

　　　　Performance Considerations

 

　　Profiling Multithreaded Rendering

 

　　Jobified Rendering (multiple clients, single worker thread)

 

　　Graphics Jobs (multiple clients, no worker thread)

 

　　　　Availability

 

　　　　Profiling Rendering

 

　　　　GfxThreadableDevice Functions

 

5. Framebuffer

　　Double & Triple Buffering

 

　　Color Buffer

 

　　Stencil & Depth Buffer

 

　　Native Resolution

 

　　　　Buffer Size

 

　　Final Blit

 

6. Shaders

　　Mobile Shaders

 

　　　　Lightmaps

 

　　Project Imports

 

　　　　Default Shaders

 

　　Shader Build Report

 

　　Shader Memory

 

　　Shader Keywords

 

　　Shader Variants

 

　　Shader Variant Collections

 

　　Shader Preloading

 

　　Built-in shaders