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Slightly Improved Underwater Shader

A personal edit I made for the underwater warping effect. Specifically, it uses the newer real-time refraction (_rt_waterrefraction) introduced in EP2, slightly increases the refract amount (.04 to .07), and changes a few other things as well. It doesn't look terribly different in screenshots but the difference is a lot more noticeable in-game (being an obsessive weirdo about water effects like me probably helps).

Also available for Half-Life 2!