Which image sampler to choose?
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Don't use the fixed sampler. It's great quality-wise, but it'll slow your render down to a crawl.
The adaptive subdivision sampler I never use myself -interiors tend to have high detail textures, lots of blurry reflections etc. So that leaves the adaptive dmc image sampler.
Settings for tests: min rate 1 (I never change the min rate), max rate 4, threshold 0.01. Dmc sampler settings: default.
Final render settings: min rate 1, max rate 8, threshold 0.005. Dmc sampler settings: adaptive amount 0.85, noise threshold 0.005 (lower = better quality), min samples 8 (higher = better quality), subdivs mult 2 (the default is one; by changing this value to 2, you're effectively doubling every subdivision setting in your scene. The quality of DOF, IR cache, brute force GI, reflections, shadows etc will increase.)
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thank so much
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No problem. Do investigate further, though. Taking my word on the inner workings of Vray as gospel may quite possibly not be the best of ideas. And check this out: http://www.thegnomonworkshop.com/store/products/tutorials/cni03/
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and additionally maybe these tutorials http://renderstuff.com/free-rendering-cg-tutorials/ and specifically this one http://renderstuff.com/best-vray-settings-dmc-sampler-cg-tutorial/ could clear up some other stuff. (yes, it'sprimarily for 3dsmax, but it's for vray, and that has the same settings universally, so it can teach you/us something.)
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@eidam655 said:
and additionally maybe these tutorials http://renderstuff.com/free-rendering-cg-tutorials/ and specifically this one http://renderstuff.com/best-vray-settings-dmc-sampler-cg-tutorial/ could clear up some other stuff. (yes, it'sprimarily for 3dsmax, but it's for vray, and that has the same settings universally, so it can teach you/us something.)
thanks! sure is a lot of reading but hopfully I will get to it soon.
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All the research I have done has always pointed to Adaptive DMC being the best. Production HQ settings being 2 Min and 6 Max with threshold set to .005. I have also read to leave anti aliasing off but have seen tutorials by Evermotion for V-Ray for Max using Catmull Rom.
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You could use an AA filter -nothing wrong with that. However, turning it off and sharpening in Photoshop offers more flexibility.
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Agreed. I much rather turn it off, save the render time and use Unsharp Mask in PS.
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@unknownuser said:
You could use an AA filter -nothing wrong with that. However, turning it off and sharpening in Photoshop offers more flexibility.
now that's an interesting idea. thanks
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That is kinda interesting... But then you're not getting supersampling (vray calculates 1.5 or 2 pixel width per final resolution) You'd need to increase the output resolution so you can downsample to where it would be without the AA turned on.
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Cool, didn't know that. I do know rendering without an AA filter and sharpening in post is supposedly less accurate than rendering using a filter. I'm sure that's correct, but I've not noticed any adverse effects myself.
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