Artem Smirnov Posted December 24, 2013 Share Posted December 24, 2013 (edited) Hi guys. A time has passed from the splash screen contest and I had free time finally. I decided to make animation from my contest work and hope you can help me with advice and feedback. I already did some tests and ran into some problems. Firstly, I cant get rid of black spots in the shader. I know that bump is source of the problem, but no matter what settings I use they still in place. In houdini 12.5 there were no spots. Second, the raytrace sss too noisy. A Point Cloud sss flicker in animation. So I cant get clean image even with insane sampling. Third, I have the obvious penetrations in the simulation, but I have some ideas how to deal with it. My shading/rendering skills are not the highest one so any comments and feedback are welcome. In the todo list is adding some atmosphere fog and particles. test animation: http://vimeo.com/82656946 Edited December 25, 2013 by Artem Smirnov 1 Quote Link to comment Share on other sites More sharing options...
mightcouldb1 Posted December 25, 2013 Share Posted December 25, 2013 Awesome work! Did you build it using wire solver and constraints? Quote Link to comment Share on other sites More sharing options...
Artem Smirnov Posted December 25, 2013 Author Share Posted December 25, 2013 Thank you, Jason. Yes, it was simulated with wire solver. There are some problems in the sim, so I think I will move it to rbd or even FEM solver. But for now the main goal is to get clean shading. I still cant get rid of this weird black spots... Quote Link to comment Share on other sites More sharing options...
mightcouldb1 Posted December 25, 2013 Share Posted December 25, 2013 I think it looks nice! I see the black spots you're talking about. I had some problems with sss myself here: http://forums.odforce.net/topic/17503-subsurface-component-mantra-surface-shader-not-shading-as-expected/#entry106139 Looks like it could be the normals? Do you still get the problem if you render a single notch of the dna? Maybe the interpenetrations could be causing some weirdness? Quote Link to comment Share on other sites More sharing options...
mightcouldb1 Posted December 25, 2013 Share Posted December 25, 2013 Maybe also see if turning off single scattering and just using multiple does anything Quote Link to comment Share on other sites More sharing options...
Artem Smirnov Posted December 25, 2013 Author Share Posted December 25, 2013 Well, this spots not depend on sss. I have a shader only with diffuse and bump and spots are not going away. When doing bump you only modify shading normals so there couldn't be any penetrations as in displace. The fact is that in houdini 12.5 everything renders clean, but in 13 something happened to shading or whatever. But in 13 it renders about 3 times faster, so I don't want to go back to 12.5 land=) Quote Link to comment Share on other sites More sharing options...
Guest tar Posted December 26, 2013 Share Posted December 26, 2013 which version of H13 are you using? there was a bug fix for blackness when the Specular Anistropy was pushed to -1 a little while ago. What is the shader and lighting setup? Something we can test with would be good. thanks! Quote Link to comment Share on other sites More sharing options...
pfarbridge Posted April 22, 2014 Share Posted April 22, 2014 Hello Artem, I work at a scientific communication department of the European Academy of Bolzano in Italy. We have made a video for the Institute of Mummies and the Iceman, who work on ancient DNA. Your DNA animation would work perfectly in the intro of the video, and we are curious if you would allow us to use it. It is for non-commercial use--simply an information video on the work of the institute. Please advise, and kind regards, Peter Farbridge European Academy of Bolzano-Bozen www.eurac.edu Quote Link to comment Share on other sites More sharing options...
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