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Idk but I think Valve were gunna implement parralax mapping. I was looking through some brick textures in source materials.gcf and found "$parallaxmap "path/to" inside, but was commented out... --Craziestdan 16:08, 10 Jan 2009 (PST)

They were.--Gear 22:39, 11 Jan 2009 (PST)
I don't get why they stopped. --Craziestdan 07:26, 12 Jan 2009 (PST)
Parallax is a part of EyeRefract, as is ray tracing. Quite a shader... --TomEdwards 07:31, 12 Jan 2009 (PST)
Cool. It's a shame a lot of these shader/material pages here on VDC are empty. Do parralax maps work without eyerefract, or is that something only bound to eyerefract? I'd love to get some parallax maps in another mod I'm in. Shame the third party parralax shader someone did is ep1 only >.< --Craziestdan 09:25, 12 Jan 2009 (PST)
Yeah, I really wish Valve would release the shader code already. Seeing all the new things in Ep2 made me want it, then L4D just made me want it more. I'm fairly sure they have a good reason so.--Gear 14:00, 12 Jan 2009 (PST)
Yeah because they only have like one guy doing all the SDK work. --JakeB 19:22, 12 Jan 2009 (PST)