Re: Images effects in MR

["Fred Valleur" <fred.valleur(at)gmail.com>]

Hi,

check out the "IMG Functions" in the mental ray docs, that should help you get started if you want to go the shader way.

mi_img_get_color and mi_img_put_color let you read and write directly to a texture at given texels coordinates.

   Hope this helps,
   Frederic.
   
-- 
Frederic Valleur | LaMaison

On Dec 27, 2007 11:30 AM, Harry Bardak <hb_xsimailinglist(at)hotmail.com > wrote:

Hi everyone.


I was wondering how to apply an custom image effects ( like the one in XSI ) within mental ray.
I mean applying an effect before to use the texture on my shader.
Typically I would like to apply a diffuse convolution on my environment map but I need to do it outside XSI ( via HDRshop ).
That's why I would to have a node for it.

Is there any direction where I can have a look ? I don't know how mr handle image loading and how I can apply an effect in image's raster space.


The others option is to use Fxtree and make a plugin for it.
But last time I checked when you load a HDR image the fxtree seems to apply a gamma correction. I would like to keep it linear and of course in float depth.
So I am a bit stuck here.

Any ideas ?





Harry Bardak
TD / Compositor.

Http://perso.wanadoo.fr/harry.bardak/
+33 6 76 63 35 54
+44 781 661 4147

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