Ankit Pruthi Posted June 15, 2013 Share Posted June 15, 2013 (edited) Hi all, I've been trying to reduce render times in mantra 12.5 as much as possible without caring for physical correctness. PBR does give really good results at around 20-30 minutes per frame, but i was hoping to find a solution that would give render times of perhaps 4-5 minutes maximum. I noticed that GI light works only when BSDFs are connected to the shading networks. I wanted to know if it was possible to get GI working with shaders that implement illuminance loops etc (the old style) without having to use physically correct shading. What would be the workflow in mantra for this kind of rendering? Does it require having to code custom light shaders that would write out or look up a point cloud and get the illuminance from them? If so, what would be the procedure to do that? I'm completely clueless about this one and shooting arrows in the dark at the moment. Any direction would be really helpful. Edited June 15, 2013 by Ankit Pruthi Quote Link to comment Share on other sites More sharing options...
kleer001 Posted June 17, 2013 Share Posted June 17, 2013 Can you please post a scene demonstrating the current workflow with a test scene? Quote Link to comment Share on other sites More sharing options...
Ankit Pruthi Posted June 19, 2013 Author Share Posted June 19, 2013 (edited) I've attached a simple file here. It contains a skylight, portal geometry, and a box with cutouts. The gilight in the scene generates the photon maps (distance threshold is set to 0 to force it to use only photons). I hope this is the kind of example you were looking for. lightCacheTest.hip Edited June 19, 2013 by Ankit Pruthi Quote Link to comment Share on other sites More sharing options...
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