erkutacar Posted February 22, 2012 Share Posted February 22, 2012 eventhough there is only daylight system active (all other lights turned off) photon emission takes very long time for an interior scene.. approx. 10mins. why would that be? and that is with low gi settings. multiplier 1 photons per sample 200 max dist 100cm photons per light 20000 Link to comment Share on other sites More sharing options...
Francisco Penaloza Posted February 22, 2012 Share Posted February 22, 2012 when you put your MR sun in the scene go to the properties of the sun and activate MR Sun photons Target, and try to cover all your house or at leas all the windows with the Sun target area, if you don't do this, Mental Ray will calculate the photon emition for the whole scene. Then I would recommend to use a Maximum sampling radius of the size/thickness of your walls, to prevent light leaks, and then play only with Average GI photons per light and decay only. Now depending of your scene I would recommend to use Final Gather first, most of the time Final Gather will do the job. Link to comment Share on other sites More sharing options...
erkutacar Posted February 23, 2012 Author Share Posted February 23, 2012 for some reason i got home and done a net render with my workstation and laptop then tried single (only workstation) render and photon emission returned to normal but in some cases it gets stuck at 9.6 or 36.7 or 56.7 percent.. i really dont know why that happens :S Link to comment Share on other sites More sharing options...
Justin Hunt Posted February 23, 2012 Share Posted February 23, 2012 might be some geometry or material that is taxing the photons. Would be easier to trouble shoot if you posted an image and your settings. jhv Link to comment Share on other sites More sharing options...
marius e Posted February 23, 2012 Share Posted February 23, 2012 Agree with Justin. Link to comment Share on other sites More sharing options...
erkutacar Posted February 23, 2012 Author Share Posted February 23, 2012 well i dont know what was the cause but i guess its material related.. i changed some material settings not knowing it would have any affect but to satisfy my visual appetite and now it calculates photons in the usual speed.. here is a lowest quality render (all the standard settings when u switch to MR) GI off, Caustics off, sampling 1/4-4 box, raytrace enabled using autovolume BSP2, FG draft with no bounces, shadows mode segment, bucket width 16. [ATTACH=CONFIG]47204[/ATTACH] Link to comment Share on other sites More sharing options...
Justin Hunt Posted February 23, 2012 Share Posted February 23, 2012 If GI is off then you are not shooting Photons, just final gather so you are not really solving the photon issue. jhv Link to comment Share on other sites More sharing options...
erkutacar Posted February 23, 2012 Author Share Posted February 23, 2012 no what i meant was there was no GI in this render but when it was on it got stuck and it returned to normal after i played around with some materials Link to comment Share on other sites More sharing options...
Justin Hunt Posted February 24, 2012 Share Posted February 24, 2012 Right got it now What materials did you play with? Link to comment Share on other sites More sharing options...
erkutacar Posted February 24, 2012 Author Share Posted February 24, 2012 i changed reflection and glossiness for the black wood, black parquet and leather. oh and i also changed some hair settings, that might have been the problem too.. Link to comment Share on other sites More sharing options...
Francisco Penaloza Posted February 29, 2012 Share Posted February 29, 2012 lost of reflections in this scene, you should turn down the reflections at leas in the wood, now it look very plastic, for what I see I think this scene can be illuminated with FG only, Give 2 or 3 bounces, increase Ray per FG point to 200 interpolation around 80 and give a try. for final render depending how smooth your Indirect illumination is coming you'll need to increase the rays and point of density. Link to comment Share on other sites More sharing options...
erkutacar Posted February 29, 2012 Author Share Posted February 29, 2012 if i increase interpolation , reflections get too blurry.. the problem is not illumination i want GI coz i will have some caustics in the scene.. and why should i turn the reflections down in the parquet?? i want my parquet varnished its reflection is .5 and glossiness is .4. i can turn it down to .4 but not lower... and i guess u havent read the whole thread.. problem is solved it calculates gi very fast now Link to comment Share on other sites More sharing options...
Francisco Penaloza Posted February 29, 2012 Share Posted February 29, 2012 Well glade your problem is solved then, I didn't read where you solved, although the interpolation on FG should not affect you reflection, interpolations for final gather are for indirect illumination calculation only, unless you check the box on the material that bake the glassiness with FG. any ways if it is solved no more talk need it. Link to comment Share on other sites More sharing options...
alnoman Posted March 15, 2012 Share Posted March 15, 2012 Every time when i'm facing this kind of photon emission problem then just use material override instead. if shows the error again then i looking at the rendering settings. make you scene with realworld scale. it is the solve of 50% problems. people are very kind here. i suggest you to share the scene then some one can solve your scene. you can use medifire destop application to upload and get the share link easily without going to browser. Happy to hearing that your problem is not still there. Link to comment Share on other sites More sharing options...
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