Rendering time

I have now rendered a testimage for 36 hours and it is still has a lot of noise. The image quality has not changed significantly the last 12 hours. Is there a way to avoid this noise in the image, apart from rendering for a week.

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test4b.jpg, 643 KB

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Permalink Reply by Richcat on March 30, 2012 at 3:34am

I have found increasing the lights helps, and playing with the lighting channels and using the Average Luminance lock and adjuxt that when rendering and to get a "white" with less speckled look seemed to help.

There still some around the light fitting.

I have also been experimenting with Neatimage - trial version.

I download you image a ran it through on with no tweaks.

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Permalink Reply by Richcat on March 31, 2012 at 4:55am

Another way to reduce render time other than a renderfarm that might help (but I have not tried this recently) is that in the Image Editor you can combine multiply Path Tracer images - only.

So say you render an image on your laptop (200 passes) and and another on your desktop (500 passes) ie at the same time, you can combine them to get the same as 700 passes.

See this thread.

If you want - post your nxtimage file if you have saved it, and I could play with the settings to see if I can make the speckles less obvious - just an idea? It might or might not work!

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Permalink Reply by Richcat on March 31, 2012 at 8:37am

One thing however If I remember rightly I might not be able to lock the Average Luminance in the Image editor. I'll have to check?

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Permalink Reply by Richcat on April 1, 2012 at 10:20am

Checked - it's not there.

Also to speed up rendering, less bump maps, helps alot.

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Permalink Reply by Richcat on April 6, 2012 at 4:38pm

Also picked up a very good tip today from Roy on the accurender forum

" Your use of background does make a mistake we see quite frequently-- the background should be very much brighter than the interior. If this were a photo it would inevitably be overexposed. If this were an HDRI you would still be able to make out detail in the background, but it would be quite a bit brighter. Peter Milner has a very good sense of this-- take a look at some of his work for some ideas"

Sorry but couldn't resist again having a go with some filters in photoshop this time- no neatimage this time. (try to put off doing some real work - good old autcadLT detailed plan of 7 bathrooms, maybe one day I will get to model and render some)