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View Full Version : Turn off AA Filters?

TSchmiesing
05-29-2008, 10:30 PM
I have a question for the advanced Mental Ray users. Is it possible to turn off the Sampling Filter completely? I know it is not possible in the drop down filter area, but I was not sure if there is a way to modify any of the 'mi' files to turn off the Filter. I ask this based on my experience with Vray. I had the option to not use a Filter. This increased my rendering time dramatically, and in some ways provided a nicer looking still image. I could control the AA through sampling. Filters were still required for animation.
Glacierise
05-30-2008, 07:07 AM
You have a 'little' misunderstanding. The AA filter just filters the results it gets from the rays cast - so you have the hard lanczos look, the softer triangle look, etc. In all situations, the renderer casts rays, it's just a matter of how the results are processed. If you want an alternative to the sampling algorhitm, turn on the 'fast rasterizer' and crank up the samples.
ienrdna
06-06-2008, 10:38 PM
The AA filter just filters the results it gets from the rays cast

And I think he is asking how to disable filtering to get "raw" result. I'd like to know as well if this is possible in MR.
Glacierise
06-07-2008, 01:01 AM
It would be interesting if you clarify what do you mean by the raw result.
joconnell
06-09-2008, 03:26 PM
You're both spot on here - chg is describing where in vray you can use oversampling to get nicer results but turn off the anti aliasing filter / look to get the rendered result without any processing being applied to the edges (lanczos / catmull etc). The filter itself puts a bit of a hit on render times, not much but still a little bit that may add up on a long sequence or high res image.

Unfortunately I don't use mr so I can't help, but just to clarify what you're both thinking is what he's asking ;)
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