Hi. I've wanted to be able to use breakable glass in my Portal 2 maps, but instead of the glass cracking, it just shows up like this:

awakenings_010004.jpg

How would I fix this?

Would any of you recommend importing the texture from elsewhere?

For func_breakable_surf, try using one of the portal 2 textures that has _break in the name, or importing some from portal 1 that do.