[Sidefx-houdini-list] Rendering directly to mplay through MTOR

zoran arizanovic zoran.arizanovic at gmail.com
Thu Apr 19 12:29:00 EDT 2007


thanks Mark for this explanation
z

On 4/19/07, Mark Alexander <malexander at sidefx.com> wrote:
>
> > so is it possible or not to apply 3D LUT in houdini like in shake or
> not?
> > z
>
> Yep, the 3D LUT can be specified in the .lut format:
>
> Version 2
> Format  any
> Tye     3D
> From    0 1
> To      0 1
> Black   0
> White   1
> Length  <length>
> LUT:
>   {
>     <r> <g> <b>
>     <r> <g> <b>
>          :
>     <r> <g> <b>
>   }
>
>
> The <length> is the cube side size (ie, 16 = 16x16x16) and there must be
> length^3 RGB tuple entries in the 3D {} section (<r> <g> <b>). In this
> instance, 0=black & 1=white.
>
> If you're running an Nvidia card with fragment shader support, the 3D
> LUT will be applied in hardware (up to 64x64x64). Otherwise, it's
> applied in software (though using a threaded algorithm, at least).
>
> You can use 3D LUTs in Houdini and MPlay anywhere you can use normal 1D
> LUTs, and you can generate 1D and 3D LUTs in COPs by setting up a color
> correction chain - RMB-menu on the last color correction node & selected
> "Save LUT".
>
> Cheers,
> M.
>
>
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-- 
Zoran Arizanovic
http://arizanovic.blogspot.com/



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