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Voronoi Fracture Geo Replacement Jan. 6, 2014, 5:28 p.m.

Anyone have a simple working example file of the vopsop method for transforming high res geo - as described by pclaes? I am having trouble creating it.
Thanks
Stephen

Passes for volumes Aug. 29, 2012, 5:43 p.m.

quack! quack!

tangent vector displacement maps from Zbrush 4 R4 Aug. 22, 2012, 5:03 p.m.

I found this link …
http://community.aqsis.org/2012/04/tangent-space-vector-displacement-shader.html [community.aqsis.org]
(thanks v_mulligan!)
This is renderman compliant 3delight shader … I just need to convert it to a vop network…
looking at the 3Delight code …

vector ndPdu = du*normalize(dPdu);
vector ndPdv = dv*normalize(dPdv);
vector diffs = normalize(Du(s)*ndPdu+ Dv(s)*ndPdv);
vector difft = normalize(Du(t)*ndPdu+ Dv(t)*ndPdv);

and the mantra renderman mappings page ..
http://odforce.net/wiki/index.php/MantraRenderManMappings [odforce.net]

I see du (rsl) translates as Du(s) in vex…. but there is also Du(s) in the 3Delight code above - is this the same as Du(s) in vex?
Thanks!
Stephen