Maya 2020 fundamentals - modelling the real world
Get halfway through a model and find it's an unworkable mess? Can't add edge loops where you need them? Can't subdivide a mesh properly? If any of this sounds familiar check this course out.
# 1 04-10-2008 , 02:51 AM
BennyK's Avatar
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Join Date: Oct 2007
Location: IL
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More Rendering Questions

*What does 'Contrast Threshold' under Anti-Aliasing do?
*What do I use Gamma for? What is Gamma correction?
Thanks in advance,
Benny


When in doubt, delete history and freeze transformations.

My latest snake game
(Requires DirectX9 SDK and Framework)
# 2 04-10-2008 , 04:17 AM
LauriePriest's Avatar
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Contrast Threshold refers usually to the smallest amount of contrast needed to detect a pattern, so lower threshold = higher quality anti alias user added image.

Gamma correction is used to convert rgb linier space into an digital video signal. The gamma helps keep the color space as expected.

Practically though in CG it can be used as a function that will increace or decrece brightness in the midrange values of an image while leaving darks dark and lights light.

A gamma correction node will convert hsv color space to rgb space.

Gamma has associations with HDRI as well, since hdri is in linier space and not made for viewing a tone mapper can basically be used to bring the range into viewable space, using gamma correction as a controlling function.

Mental ray supports a per pixel and lens or sample based tone mapper.

Hope that helps.

# 3 04-10-2008 , 04:23 AM
BennyK's Avatar
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Join Date: Oct 2007
Location: IL
Posts: 738
Thanks, It does... most of it I read in Maya help but it's a pretty good explanation :bow:
Benny


When in doubt, delete history and freeze transformations.

My latest snake game
(Requires DirectX9 SDK and Framework)
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