 | | | Replace sampleInfo | Replace sampleInfo 2003-12-01 - By Duncan Brinsmead
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I surprised it is so slow for you.. are you using getAttr calls inside an
expression?(this would be slow)
At any rate you could try using the ramp shader. You can set the input on
the color and incandescence ramps to be facing angle. This basically is like
mapping facingRatio into the coordU of a ramp texture. The specular Rolloff
gradient is always mapped to facingRatio and modulates both the specular
lighting and environment reflections(this can be used to simulate the
Fresnel effect, where low refractive index materials are more reflective at
grazing angles). Thus you have a great deal of control. Also the ramp shader
should not be too much slower than a Blinn shader. It should be much faster
than using ramp textures. In terms of applying textures you can map any of
the ramp indices( this is not always obvious to people).
Duncan
-- --Original Message-- --
From: maya-bounce@(protected) [mailto:maya-bounce@(protected)]On
Behalf Of NICK
Sent: Saturday, November 29, 2003 9:48 AM
To: maya@(protected)
Subject: Replace sampleInfo
hi
Who can tell me how can I replace sampleInfo Node ?
Our shader used sampleInfo face ratio ,but it make rendering so
slowly.So I wonder if we can use another mothed to replace sampleInfo face
ratio.
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