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 >>> >> >> > >
