ao in opposite direction

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  01 January 2008
ao in opposite direction

is there any mr-shader out there which can calculate the occlusion in the opposite direction of the normal for effects similar to translucence?
so that a sphere which is behind a plane is darkening the plane.
camera ---> || O

any ideas?
  01 January 2008
You may try my p_scatter_wrap shader from shaders_p set.
It compute some kind of occlusion inside object toward light direction.

You may download shaders_p here:

P.S. p_scatter_wrap will works only for volume objects, but not for flat like polyplane.
Pavel Ledin aka Puppet

Last edited by Puppet| : 01 January 2008 at 10:54 AM.
  01 January 2008
nice one!
thanks for the quick response! i was just using your MegaTK shader and it's refraction max dist values in a complete uncommon way - to get rid of intersections in my feather system.
it would be so helpful to have an aocc-node which could (just) sample the other side of the normal and a node which just samples the raylength after intersecting a surface.
btw. the mia falloff color doesn't work correctly.
thanks for your help puppet!
  01 January 2008
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