Custom colored textures problems
I was wrong there, I admit. Pardon my ignorance.
A more fitting texture is in the works. Like I said, using the concrete texture is a placeholder to test if colored textures worked.
OK Habzs, I've been testing this out and it definitely doesn't have to do with the blend modes or the detail blend factor. I've tried also multiple settings for the func_brush, I've tried different shaders, and even a 7.5 version (and without the SRGB flag) of the texture "plasticwall004a.VTF"... but to no avail.
Then I thought that, maybe because of what the parameter $color is and what it does, it only works properly on func_details not in actual entities like the func_brushes.
It's quicker if you forget about that parameter and make actual coloured textures for your frames 
I'm attaching a switchable (multiframed) texture for you. You've got the blue one in first frame (0), and then the orange (1) so you can switch your func_brushes textured on this texture by a env_texturetoggle entity. I'm not sure if this is what you were looking for... Let me know
useful tools and stuff here on TWP 
[spoiler]
[/spoiler]Thanks! I still find it weird that the $color param doesn't work though.
Guess I'll whip up a proper frame soon. But for now, the portals with the appropriate colors:
What's up with that weird excursion funnel?
Aperture Science: We do our science asbestos we can!
It's a re-texture I'm working on, I'm trying to recreate the excursion funnel from one of the teaser posters.