Parent: MC-156088
The bug
I went to reload resource pack and got a really weird image for one frame near the end of the loading bar. The textures seem to have gotten messed up and attached to the wrong blocks. Grass turned into green glazed terracotta and stone turned into blue. I don't even know what the scaffolding turned into. It returns to normal once the Mojang logo is gone.
Entities (including pantings) don't seem to be affected by this. Item textures are also able to be loaded by this bug.
It seems to happen more often when a texture is changed.
How to reproduce
Get a texture pack
Enter a world
Change any file name in the texture pack
Press F3+T and watch closely
Near the end you'll see the textures glitch for a frame
Linked issues
relates to 1
Attachments
Comments 7
Suspect this is similar to MC-153547
Aha! I think I know the cause of this. When a block finds a non-existent texture, it just leaks an image from a spritemap to fill it in. This image is from a model file which calls a uv from out of the bounds of the image.
Image and respective model file:
[media][media]
Result:
[media]
Child issue of MC-156088
Seems to have been fixed in 19w38a. There is no longer any starting transition to the loader so this doesn't appear any more.
The real question is why isn't the loading screen background appearing (or rather becoming opaque) quick enough so that you don't see this issue?