Some example images to help better illustrate my idea.
1: http://www.wired.com/images_blogs/photos/uncategorized/2007/09/24/kaleido_light.jpg
2: http://www.blogcdn.com/www.wowinsider.com/media/2008/11/crystalsong-forest-aglow.jpg
In the second image the gaps would be a lot narrower so you could easily walk over them (if needed) without falling.
EDIT:
This would be for Source - IE: HL2 and onwards.
Forum posts
Is it possible to create wall textures that emits a glow and also acts as a light source itself?
Not the whole wall but portions of it, to give an eery alien feel for example. Like a fungal infested wall that emits a glow, or a series of lines that run through the wall that emit light.
Not a dynamic 'area' light but a direct source of light itself, so if you moved close to it you would see the glow reflect off your weapon if you went past a line in it as appropriate, further away it is just a general overall glow depending on other lights.
Not the whole wall but portions of it, to give an eery alien feel for example. Like a fungal infested wall that emits a glow, or a series of lines that run through the wall that emit light.
Not a dynamic 'area' light but a direct source of light itself, so if you moved close to it you would see the glow reflect off your weapon if you went past a line in it as appropriate, further away it is just a general overall glow depending on other lights.