 | | | Replace sampleInfo | Replace sampleInfo 2003-12-01 - By Jeremy Fernsler
Back
speaking of this and drifting off topic (sorry!) is there a listing of
what nodes are faster and/or slower? Some chart that details these
things?
-JF
On Dec 1, 2003, at 8:10 AM, Duncan Brinsmead wrote:
> 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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