Bug Unity 2020.2.0f1: CopyTexture has a new bug?

Hi!

Unity 2020.2.0f1 causes an error that didn't happen in 2020.1:

CopyTexture called with mismatching sample count per pixel (src 2 dst 1).

This happens when calling CopyTexture with

• src = RenderTexture and
  
  
• dst = Texture2D.
  

Both have mipCount set to 1. Seems to have no effect on the issue.

Both have TextureFormat.ARGB32 / RenderTextureFormat.ARGB32.

Anyone have an idea on how to overcome this?

Thanks!

 

I don't know how to overcome this since I didn't face that problem... yet.

However, the issue seems to be that the function cannot automatically resolve the samples from 2 down to 1 while copying. If I remember correctly, whenever I had a render texture with multiple samples, it would be automatically resolved to 1 sample by unity before reading (with the exception of depth textures). May be that behavior changed (I didn't try 2020.2 yet).

I'm not sure but this may help: https://docs.unity3d.com/ScriptReference/RenderTexture.ResolveAntiAliasedSurface.html

 

I worked my way around this by not using CopyTexture at all.

Previous solution was to convert RenderTexture into a Texture2D which was used to create a Sprite.

New solution is to use RawImage instead of Sprite which can take RenderTexture so we don't have to copy the data into a Texture2D.

 

For me, disabling MSAA fixed the issue.

 

thanks!!