Strange error message: mipLevel < m_MipCount

Unity Engine
1

I load some textures at runtime, which works perfectly fine, including mipmaps:

photoTexture = new Texture2D (2, 2, TextureFormat.DXT5, true);

However this causes a strange “error message” in the editor (console):

! mipLevel < m_MipCount

This error has no effect, I’m able to build the project, but it’s a bad feeling, seeing this always at the console.

Has anyone an idea how to get rid of those message?

Best regards
Jörg

2

I also just ran into this when doing:
m_texture = new Texture2D(
1,
1,
TextureFormat.DXT1,
true);

m_loader.LoadImageIntoTexture(m_texture);

As you can see the texture is just created to be able to fill in the data from a WWW object.

3

If you use a different texture format (RGB24 I believe) it works fine, without the error msg.

But I have to use DXT5 and even if the problem is some kind of a non-event (because the program still runs fine), the red error msg are a bit annoying, feels not good.

So it seems there is no workaround for that?

4

Since I upgraded to 5.5 yesterday the “error” has changed to:

Assertion failed on expression: ‘mipLevel < m_MipCount’

However, its the same strange thing. Everything runs fine, but this bloody messages in the editor during runtime driving me nuts… grrrr

5

new Texture2D(int width,int height,TextureFormat textureFormat,bool mipChain,bool linear)
Make sure the legth and width are not zero.

6

This is caused by the fact that DXT5 textures should at least be one DXT block in size (4x4 pixels) so creating a 2x2 or 1x1 DXT texture is invalid. We noticed this issue previously and it should be fixed (by giving a clearer error) in 2021.

2 Likes
7

Anyone else who’s still using 2020, this seems to happen when images aren’t power-of-two sized.