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undesired result when rendering disp map (Maya)


This is what I get. I’ve used MD2 for displacement map and mental ray in maya for rendering. Why doesn’t these two objects match as they do in zbrush?

I’ve followed the guide ZBMAYA_Disp-2005-Nov-10.pdf exactly but since it wouldn’t work i also tried playing around with the alpha gain and alpha offset but without any nice results.

I really need help.

Since you are asking people to assume you have done everything perfectly and it doesn’t work and thus the tutorial is in error, you may not get that much help.

What are your Preferences set at for import and export in Zbrush?

Have you tried a known to work object posted at various areas of the forum to see where you might have made a mistake?

The solution seems simple enough - you have a flipped map. Or errors in your mesh that result in incorrect map interpretation.

If you provide useful information, people might be able to help.

Hey and thanks for the reply. Sorry i wasn’t that thorough. I was really tiered and just meeded to get it out before i’d go to bed.

Anyway, here are the geometry import/export settings. You mentioned my disp map may be flipped? I really don’t understand because they have to be flipped one way or another and MD2 does this automatically. If this is not what you mean, then I appreciate if you’d explain. The guide also says you should use 2.2 vs 1.1 for the alpha gain and offset which I did.

just to clarify, the guide says use 2.2 and -1.1. the negative is important or else everything looks like the stay-puft marshmallow man

yes that’s right. of course it it minus before. However my problem here is not a case of wrong numbers in those fields. All other geometry displace just fine.
Why it isn’t working on the face I can’t understand, nor do I know a way to fix it.

what are your settings in md2? these would probably be the source of the error. i use DE-LBEK-EAEAEA-R32 Quick Code to generate 32bit floating maps and render in mental ray. i have found significant rendering differences generated by the different settings in md2. however, the afore mentioned code produces the most reliable and expected results for me.

Ok, Thanks. I’ll try this one. I just went ahead and used the predefiend settings or the code which was provided in the guide.