pbowmar Posted March 6, 2008 Share Posted March 6, 2008 Hi, So, after reading this: http://www.zbrush.info/docs/index.php/Unde...ing_Normal_Maps I realise that so far I haven't seen a post how to properly use a ZBrush Normal Map in Houdini/Mantra. I may have missed it however All the tutorials and examples I've seen use a Bump Map VOP which is not correct! The Tangent Space normal map from ZBrush is describing a direction, not just a height which all the Bump Map VOP does. So, the correct way to use it is to put a Fit VOP with From being 0-1 and To being -1 to 1 after loading it in a Texture VOP, then use that into the Lighting Model or whatever you want, to get the "bumpy" effect. I may put this on the Wiki if I have time, which I don't right now... Cheers, Peter B Quote Link to comment Share on other sites More sharing options...
edward Posted March 7, 2008 Share Posted March 7, 2008 It's been a while now but I thought this was already on the wiki -- Houdini_and_ZBrush Quote Link to comment Share on other sites More sharing options...
pbowmar Posted March 7, 2008 Author Share Posted March 7, 2008 Hi Edward, That's what got me started on this quest The Wiki correctly covers Displacement maps out of ZBrush but does not cover Normal Maps. There are forum topics here that (incorrectly) state you use a Bump Map VOP to use a Normal map so I wanted to let people know the correct way to deal with Normal Maps. Displacement is the way to go, IMO, and just use the Do Bump toggle if you want a not-real displacement. Oh wait, Mark said to use the Real Displace property didn't he? Well, anyway, just trying to add to the knowledge pool. Cheers, Peter B It's been a while now but I thought this was already on the wiki -- Houdini_and_ZBrush Quote Link to comment Share on other sites More sharing options...
edward Posted March 10, 2008 Share Posted March 10, 2008 Well, if you have any example zbrush normal maps with associated low-poly geo, I'd like to take a look. Quote Link to comment Share on other sites More sharing options...
LEO-oo- Posted March 11, 2008 Share Posted March 11, 2008 yep - a sample would be nice. Quote Link to comment Share on other sites More sharing options...
JDenker Posted March 13, 2008 Share Posted March 13, 2008 (edited) i can give you a sculpted head model with a generated normal map if you like. but the normal map was generated in mudbox, but i guess thats not causing any problems at all. let me now if you guys want that file. cheers -J Edited March 13, 2008 by JDenker Quote Link to comment Share on other sites More sharing options...
edward Posted March 13, 2008 Share Posted March 13, 2008 Sure. But make sure that its a tangent space normal map. Quote Link to comment Share on other sites More sharing options...
pbowmar Posted March 21, 2008 Author Share Posted March 21, 2008 Hi Edward, I don't right now. And yes, Tangent Space is what you want always out of ZBrush. Cheers, Peter B Well, if you have any example zbrush normal maps with associated low-poly geo, I'd like to take a look. Quote Link to comment Share on other sites More sharing options...
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