In Linear color space, it can be observed that quantization problem is occurring with ARGB32 8 bit format when RenderTextures are used. It seems like float precision is not correct in Unity.

Steps for reproduction:
1) Download the project “LinearRenderTextureBug”
2) Open the scene “RenderTextureTest”
3) Enter play mode and observe the artifacts on the RenderTexture

Notes:
- In RenderTextureTest scene, RenderTexture is obtained through a custom shader
- float4 type is used for RenderTexture to avoid compression
- Quantization problems are less noticeable when ARGB32 16 bit format is used
- There is another scene with “ImportedTexture”, where imported textures from Photoshop are tested instead of custom shader
- In Gamma color space, it works as expected
- Not a regression, applicable to all Unity versions