Ooops, sorry for that. I've posted other questions to forum you've provided. Thanks for reply about tiles
2015-04-24 9:30 GMT-07:00 Marc Dion <[email protected]>: > So far as I understand it, the tile size is only used to format the data > into chunks which better match an individual computer's capabilities. > > There should be no change in quality. If there is a difference in the > final results, this would be a good reason to file a bug report on the > tracker. https://developer.blender.org/ > --- > > A better place for questions like this may be > > *http://blender.stackexchange.com/questions > <http://blender.stackexchange.com/questions>* > Other people starting out will want to know things like this and Blender > Stack Exchange answers will be easier for them to locate. > > I think this list is supposed to be for programmers to discuss changes to > Blender's source code :) > > On Fri, Apr 24, 2015 at 8:47 AM, Andrey Chursin <[email protected]> wrote: > >> Thanks for fast response! >> >> As I understand, tiles size only affects performance (+memory usage) >> and may be preview generation, but does not affect quality of result? >> So basically, does adjusting of tiles size impact finally rendered >> image? >> >> 2015-04-23 22:39 GMT-07:00 gandalf3 <[email protected]>: >> > Regarding CPU vs GPU, tile size plays a big role. As a general rule of >> > thumb, CPUs like smaller tile sizes and GPUs like larger tile sizes. >> > It varies from GPU to GPU and from scene to scene, but I tend to use a >> > tile size of about 128 for my gpu. >> > >> > On 04/23/15 22:36, Andrey Chursin wrote: >> >> Hi >> >> >> >> I am processing blender file using python script passed in -P cmd >> argument >> >> >> >> I am new to blender so I am not familiar with all bpy >> >> objects/properties. Can you help me with it? >> >> >> >> 1) How can I get current rendering tile and estimated time in cycles >> >> rendering engine? I know there is render_stats handler, and I even >> >> found function BlenderSession::get_progress in sources, but I am still >> >> puzzled how can I get this info from python script. >> >> 2) How can I get list of cameras available? >> >> 3) How can I setup active camera for rendering? >> >> 4) How can I get/set number of samples when rendering? >> >> >> >> And some question about GPU performance >> >> >> >> I was rendering first frame from classroom from blender demo >> >> ( >> http://www.blender.org/wp-content/uploads/2015/04/classroom-200x107.png) >> >> >> >> I tested it on c4.large AWS virtual machine (2 cores of Intel Xeon >> >> E5-2666 v3) vs g2.8xlarge GPU vm(4 unspecified nvidia GPUs with 1,536 >> >> CUDA cores each) >> >> >> >> What puzzles me is that 2-core CPU vm renders 2x faster then 4-GPUs >> machine. >> >> >> >> On GPU I was using combined cuda device, and all GPUs was actually >> >> busy(nvidia-smi shows 99% utilization of all 4 GPUs) >> >> >> >> I understand that GPU/CPU are not very comparable, but results are >> >> still strange. Is there any specific conditions when GPU actually >> >> works faster then CPU? >> >> >> >> >> > >> > >> > -- >> > -gandalf3 >> > >> > _______________________________________________ >> > Bf-committers mailing list >> > [email protected] >> > http://lists.blender.org/mailman/listinfo/bf-committers >> >> >> >> -- >> Regards, >> Andrey >> _______________________________________________ >> Bf-committers mailing list >> [email protected] >> http://lists.blender.org/mailman/listinfo/bf-committers >> > _______________________________________________ > Bf-committers mailing list > [email protected] > http://lists.blender.org/mailman/listinfo/bf-committers -- Regards, Andrey _______________________________________________ Bf-committers mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-committers
