Thanks, I knew the quantity of segments was fixed but I forgot about the subdivision of the cross-section...
2013/12/13 Rob Chapman <[email protected]> > And the strands are default particle shapes right? There are a few little > known setting for changing the subdivision level per particle and from > screen size to world size etc , by default I think it is setup for distance > to camera so if its close then the setting may be too high, it is easy to > switch off or change, just can't remember the attribute names off the top > of my head :) > On 13 Dec 2013 16:57, "Antonin Messier" <[email protected]> wrote: > >> Thanks Peter, I would have seriously begun contemplating your parallel >> universe theory but the problem seemed to have been the strands. I'm still >> not sure what causes the strands to be so long to mesh the closer you get >> to them though. >> >> >> >> >> >> 2013/12/13 <[email protected]> >> >>> something easily overlooked: a close up could fill the whole of the >>> image, while a long shot might have for example 10% of the image area >>> covered with the subject. In which case a ten fold difference in rendering >>> time is totally normal. >>> >>> other than that, any combination of stochastic sampling - ambient >>> occlusion, area lights, soft reflections/refractions, DOF and/or MB ... - >>> will slow down mental ray massively in close ups – in my experience more so >>> than you would expect taking into account the image area coverage mentioned >>> above. >>> MR’s is sending endless amounts of rays per pixel in recursive loops – I >>> suspect MR of actually sending samples to a parallel universe where >>> rendering gets exponentially faster the more samples you ask – but at this >>> point this is just conjecture. >>> >>> adapting sampling settings, using unified sampling or switching to the >>> rasterizer are all things that might alleviate the pain. a little bit. >>> >>> >>> >>> *From:* Antonin Messier <[email protected]> >>> *Sent:* Friday, December 13, 2013 5:10 PM >>> *To:* [email protected] >>> *Subject:* Re: Closeup frames super long to render. >>> >>> Hi, yes, Mental Ray, Vegetation is mostly deformations on curves, >>> there are ICE strands as well but not in the closeup. >>> >>> >>> >>> >>> *Antonin Messier Turcotte*3D and Compositing Artist >>> Fly Studio >>> >>> T: 514-490-1117 >>> M: 514-743-4211 >>> E: [email protected] >>> www.flystudio.com >>> >>> >>> 2013/12/13 Eric Mootz <[email protected]> >>> >>>> Hi Antonin, >>>> >>>> What is your vegetation made of? >>>> Are there any particles involved? >>>> Are you rendering with Mental Ray? >>>> >>>> Cheers, >>>> Eric >>>> >>> >>> >> >>
