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If you are using VRay SP2, you should put a NormalBump map in the bump map channel and set the normal map image in the Normal slot. Remember to set the bitmap input gamma to 1.0 if you are using a 2.2 input gamma in max properties.
See attached image.
There is a new normal map (VRayNormalMap) channel in VRay SP3, you should be using it as it works correctly with VRayProxies too. The procedure is more or less the same.
Just take a look on the zbrush forum. Plenty of people use normal maps there. I dont know technically what the difference is so cant really help..
Plus, it may be worth searching this forum as Im sure ive read other stuff on normal maps...probably plenty of technical details/imagery on google if you search that also.
Yes, I was being a bit lazy there! Just done a search and they do seem to be mighty impressive ways of generating 3d geometry in a similar fashion to displacement. However, I gather you can't really generate a normal map easily without first having the actual geometry to produce it - ie its not like simply 'grayscaling' a bitmap image like I sometimes do to 'cheat' at a bump map.
<the reaon for my interest is I have just started playing with Bercon tilemaps and I don't seem to be getting the depth/quality of bump I had expected>
thanks, those look pretty darn cool! I'm going to grab those and show the boss what normal maps can do for terrain. He was asking about normal maps just the other day.
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"Sometimes life leaves a hundred dollar bill on your dresser, and you don't realize until later that it's because it fu**ed you."
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