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Vops Problem


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hi all !

i thought i would do a little practice in VOPS and start simple

by making a simple desaturating HDA ( Houdini v8.2)

i thought convert :

RGB to HSV,

multiply Sat with say .5,

then convert back to RGB...alas....

it seems to fade to white losing the contrast in grey values.

am i missing some maths here ?

i tried re-wiring to confirm that the vector to 3 floats node was indeed creating 3 floats each representing H,S and V

and this seems right.

my current work-around is to simply mix in a totally desaturated version with the original version.

any ideas ?

dan

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ok i found a discrepancy !

i used a 'scales' VOP and a 'color mix' VOP as my test in a Vex Surface shader

when i switched over to the mandril texture instead as an input - it worked !

i dont get it - whats the difference ?

is the 'color mix' not giving me RGB values ?

Edited by daniel.phillis
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