Re: mental ray opacity map with hair and fur

Use a cutout map instead, in the Arch and Design shader its under the 
special effects tab. Cutout is opacity mapping on steroids

JHV

<davidmcb> wrote in message news:5710618@discussion.autodesk.com...
I have a student doing a project with an outdoor scene.  The grass on the 
ground is done with hair and fur.  There are some leafy plants done with 
simple geometry that have Opacity maps applied. In mental ray where the 
shadows should be on the grass surface  there  is simply a washed out area 
that has the  shape of the simple geometry.  The first thing I noticed was 
that he was using a default Opacity map.  I switched to a mental ray opacity 
map and  the shadows were fixed up  fine.  However in areas that should be 
transparent on the leaf surface, the rendering of the hair beneath has the 
same washed out flat quality.  Have I failed to set up the Opacity map 
correctly or is there a compatibility problem between the hair and fur 
modifier and the mental Ray  Opacity map? any ideas how to solve this