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# ctrl.studio, July 25 2005
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# ctrl_rays
# shader plugin for Xsi/Maya ( mentalray 3.3 and later)
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# revisions::
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# (v1.0) pubblic release
# (v1.1) bug fixed
# (v1,2) ctrlocc rays support
# ////////////////////////////////////////////////////////////////////////////////



ctrl_rays is a kind of ray switcher shader but it is different
in what it can also distinguish the fg precomputing phase from 
the fg render phase. this can really speedup fg production
scene by a factor of 3x under heavy circumstances like glossy
reflecions and so on. one infact could pass different sampling
settings to the different phases, generally a rough sampling
for the precomputing and higher samplings for rendering; but
also textures with different sizes, light bump to not incur in
the usual warning msgs and so on. transparency rays also supported.



usage
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plug what you need for that kind of rays and enable the slot. 
but remember that with ctrlocc rays you should not have a
ctrl.occlusion shader preceding the ctrl.rays in the rendertree.