Graphics.CopyTexture not working

Question

Hello everyone! I'm trying to implement instant screen grabbing script for VR application and can't overcome the problem of using new method: Graphics.CopyTexture. Here are main code samples:

1) Initialization:

 rt = new RenderTexture(widht, height, 24, RenderTextureFormat.ARGB32);
 tex = new Texture2D(widht, height, TextureFormat.ARGB32, false);

2) Trying to copy texture:

 cam.targetTexture = rt;
 cam.Render();
 Graphics.CopyTexture(rt, tex);

After launching that code I got an error saying: Graphics.CopyTexture called with mismatching mip counts (src 1 dst 9) UnityEngine.Graphics:CopyTexture(Texture, Texture)

What am I doing wrong? Thanks!

Answer 1

Answer by NoituLover · Sep 13, 2017 at 12:31 PM

Hey there, when you are grabbing from the Screen I assume you are using sth. like that:

  private void OnRenderImage(RenderTexture source, RenderTexture destination)
 {
     ...
 }

I guess the texture you created has mipmaps, the one grabbed from the screen doesn't. Therefore try to create your Texture without mimaps. In cas of Texture2D you could try this:

 screenGrabTexture = new Texture2D(Screen.width, Screen.height, TextureFormat.ARGB32, false);

with the last parameter set to false your screenGrabTexture will not generate mipmaps and should fit to the RenderTexture received in the OnRenderImage-method.

Best wishes, Chris

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Graphics.CopyTexture not working

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