So I imported the clock textures from Portal 1 over to Portal 2, and while they look fine in the editor, they glitch out in-game, and the timer doesn't work correctly. Can anyone help me?

Can you show what the VMT and VTF files look like?

vrad.exe wrote:

Can you show what the VMT and VTF files look like?

The VMTs and VTFs are exactly as they appeared in the Portal 1 files from the pak00.vpk. I only adjusted the centiseconds and milliseconds VMTs.

Sorry for the late reply - I don't see anything obviously wrong here, but I am noticing how the problematic ones seem to be the ones that use material_modify_control entities to cycle quickly as opposed to the slower ones that use env_texturetoggles. Can you make sure that the material_modify_control entities are parented to the respective number brushes? You can also try temporarily removing the MaterialModify proxies from the materials to see if that makes something show up (although it will prevent them from animating, hence only temporarily)