sebkaine Posted February 18, 2015 Share Posted February 18, 2015 (edited) Hi Guys, Sorry for an other new thread on "how to render volume efficiently in mantra" , but i haven't find a good enough ressource about this subject. Is there a place / ressource / post / tutorial / book who explain very precisly how mantra works for volumetric rendering. I mean after reading this , you know exactly what is what , and how you must work to optimised all. for ex I would like to understand. - each step of the rendering process and how they are executed sequentially for each mode reyes/raytrace/pbr - i would like to understand how the volume grid is treated by mantra and how each parameter affect this grid - i would like to understand exactly all the obscur parameter and how we can enhance them (Z-importance / offscreen quality ...) ... is there a place where it is possible to learn to know exactly what you do with mantra , and not just having an approximate understanding of what you do. thanks for any useful input ! Cheers E Edited February 18, 2015 by sebkaine Quote Link to comment Share on other sites More sharing options...
michael Posted February 18, 2015 Share Posted February 18, 2015 http://www.sidefx.com/docs/houdini14.0/render/ all this has been re-written and it seems pretty good...maybe not as detailed as you'd like but it's much better than it was... Quote Link to comment Share on other sites More sharing options...
Guest tar Posted February 18, 2015 Share Posted February 18, 2015 Unfortunately there is no one place to read to find out all this. You must experiment too. Mantra H12 Masterclass has good info https://www.sidefx.com/index.php?option=com_content&task=view&id=2160&Itemid=344 Quote Link to comment Share on other sites More sharing options...
edward Posted February 19, 2015 Share Posted February 19, 2015 Not quite what you're asking for but still kind of relevant are the Production Volume Rendering course notes at http://magnuswrenninge.com/productionvolumerendering . In the second set of course notes, there's an implementation description of Mantra's microvoxel rendering written by Andrew Clinton (which he won a Sci Tech award for). Quote Link to comment Share on other sites More sharing options...
sebkaine Posted February 19, 2015 Author Share Posted February 19, 2015 (edited) Many thanks for all your input guys ! i will carefully watch this. Edward the paper looks very interesting, i love those drawings when you have figure and graph that resume all. Visually understand how mantra do to raymarch, and how each parameter can affect this is really what i need. It looks that prman 19 and and Mantra are even closer now , maybe checking the prman help about volumetric rendering, could also give more info. I have find that this post by jeff was very good: http://forums.odforce.net/topic/6143-how-do-i-optimize-my-volume-lighthing/?p=40892 Those looks interesting also: https://vimeo.com/goprocedural/videos/search:render/sort:date https://www.sidefx.com/index.php?option=com_content&task=view&id=1412&Itemid=344 http://forums.odforce.net/topic/19632-how-to-eliminatereduce-noise-in-volume-renders/ http://magnuswrenninge.com/content/pubs/VolumetricMethodsInVisualEffects2010.pdf If you have any additional ressources ! please share ! Edited February 19, 2015 by sebkaine Quote Link to comment Share on other sites More sharing options...
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