I finally found the textures for the lift pistons, but now something's wrong. When viewing the material in the Hammer texture viewer, they're black. But when I look at an applied texture, they're normal. When I play the game, the textures are pitch black, except for some detail at the ends. Does anyone else have this problem?

could posibly a lack of env_cubemaps or built cubemaps as these textures are near 100% reflective (all VALVe need to do now is add in real-time reflections of Mr Freeman/Mrs Chell)

You need to build your cubemaps to see proper reflections.

Ok, thanks.

Edit: Nope, no dice. I built cubemaps, added env_cubemaps, and then built cubemaps a few more times to be sure. At one point in the past, they worked. And that was before I knew cubemaps existed.

Is mat_fullbright on? Is there sufficient lighting in the area?

Are you sure you are using the correct texture? The behaviour you describe sounds like you are using a texture which was meant for a model rather than a brush.

Ok, got it working now.

username wrote:
Ok, got it working now.

And the problem/solution was?

Well, I aligned all the textures to world, added some env_cubemaps, and ran buildcubemaps.

It was aligning the textures to world in the face editor that did the trick.