Will you be using the crystals as lights in caves or just to set the scene/detailing? Because as long as the crystal aren't particularly colourful I think that could look pretty great having a low traffic cave route lit up with them.
They will both detail and light the scene in certain places. However, from experience, zig crystal colors have been known to cause team color confusion (just ask any senior tf2m member who remembers pl_zig). For lighting, I'm going with mostly white, with just a tiny bit of saturated color. The crystals themselves can be more or less saturated, as model textures don't actually factor into environment lighting, even with $selfillum on, and their material written correctly into the .rad file--just another limitation. I'll be using regular lights placed around the crystals, and then redirecting the models lighting origin to an info_lighting I've placed inside a small hollow box, covered with tools/black.
And I did post it in the WIP thread, but it appears this is relevant, so I'm reposting it here:
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