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# 30 09-12-2002 , 12:04 PM
undseth's Avatar
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Join Date: Aug 2002
Posts: 1,135

mental ray stories -Final Gathering- 24

user added image Thanks Kevin! user added image

In this render the minrad was at 1 and the same vaule was set to the max rad. I would probably set the minrad lower for better renderings but I'm just fooling around here.

RESULT:
The render is better and the grains are smaller all over I think.
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I will now take a look at the differences between the PreviewFinalGather and Production mode.

Default MAX REFLECTION RAYS
Preview = 2
Production = 10

Default MAX REFRACTION RAYS
Preview = 2
Production = 10

Default MAX RAY DEPTH
Preview = 4
Production = 20

My FINAL GATHER RAYS
Preview = 200 set by me
Production = 1000 (default I think)

DefaultSAMPLING QUALITY
Preview = min -1 and max 1
Filter = Triangle width = 2 and height = 2
Production = min 0 and max 2
Filter = Gauss width = 3 and height = 3

I looks that these are all the parameters that is different in the defult settings, between the previewfinalgather and the producion quality.

I will do a production render now with the settings above. The production quality will have the same min- maxrad settings as the preview mode. Which is why I used the preview menues in the first place. The finalgather rays is beefed up to 1000, with a higher sampling value and a different sampling filter.

Im not sure about the filter thing, but the sampling gets rid of those jaggy edges. Most prominent in edges that arenet quite 90 degrees perpendicular(?) to the ground plane.