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Material proxies are a neat little feature of the Source engine that let you alter various properties of a material dynamically. This can produce some neat effects, as the texture position, scale, rotation, transparency and much more can be changed continuously, or even in response to game events.
Take Half-life 2, for example. You know those combine force-fields, that ripple with energy, and fade out as you move away from it? Or in Team Fortress 2, you’ll have seen the rotating radar screen in the 2fort basement. Both those effects are done with material proxies. Read more ...
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