samp Posted June 2, 2002 Share Posted June 2, 2002 Found on http://www.cgtechniques.com here's the bump problem no matter what setting I use, (even a bump intensity of 1) I get theses plotchy noisy artifacts once bumps are turned on tweaking/cleaning the bump maps source didn't help darth_shader: no regathering on the previous image (didn't improve much) and just one skysystem (skylight+sun) filtering of the solution set to 2 rendering of solution + direct illumination (raytraced shadows) That's the same problem I have with the sponza scene ... Anyone that has a sollution for it? I've tried everything ... (exept regathering, seems like my PC can't handle that, VIZ4 hangs when I try to render with it ...) And if you ask me, Lightwave scores best in that content. Man, what a results ! Super realistic ! Not even 1 VIZ4 image in the contest where I think : "Hmmm, is that a photo or a CG image?" I hope Autodesk fixes this soon! Link to comment Share on other sites More sharing options...
STRAT Posted June 2, 2002 Share Posted June 2, 2002 well i've not yet used viz 4, only viz 3, but try this - 1) supersampling - try messing with these settings for the main material 2) material filtering - the standard is set to pyramidal, change this to summed area with a value of 0.5 Try this for both diffuse AND bump channels. 3) rendering filters - try a different render filter other than the standard area filter. try catmull-rom maybe. Link to comment Share on other sites More sharing options...
Wojciech Klepacki Posted June 2, 2002 Share Posted June 2, 2002 Hi SAMP! U should use Radiosity Override in Material Editor. Try to change Indirect Bump Map Scale. Set this parameter much below default. The value between 0,2-0,4 often causes ViZ to produce nice (acceptable I mean) results. Best regards. Link to comment Share on other sites More sharing options...
samp Posted June 3, 2002 Author Share Posted June 3, 2002 I allrady tried it with 0,3 ... Will try a lower vallue too Link to comment Share on other sites More sharing options...
Frank Posted June 3, 2002 Share Posted June 3, 2002 It looks like you need to set your refine iterations (all objects) higher. 2 is always a good number. It may take a little longer for the solution to run. But I think it should fix your problem. Link to comment Share on other sites More sharing options...
Wojciech Klepacki Posted June 3, 2002 Share Posted June 3, 2002 Hi Frank I thing that refining iterations won't help, when u use regathering. I suggest u to decrease indirect light bump scale. Best regards. P.S. Here is nice tutorial http://www.alexcasanova.com/ (tutorials section) Link to comment Share on other sites More sharing options...
nisus Posted June 3, 2002 Share Posted June 3, 2002 Indeed wojcieh. Refining won't help when using regathering. Decreasing the indirect light bump scale will get the job done. nisus Link to comment Share on other sites More sharing options...
samp Posted June 4, 2002 Author Share Posted June 4, 2002 I cannot use regathering since my VIZ4 hangs then on my old crappy PC Btw, the example image here is NOT mine! But I have he same problems. And usualy I take 3 for refine itirations, so that'll do Link to comment Share on other sites More sharing options...
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