🚀 go-pugleaf

In article <1992Dec13.063538.9696@athena.mit.edu> shanega@athena.mit.edu  
(Shane G. Artis) writes:
> While there's a little attention focused on prman and qrman I'll insert
> my favorite question into the discussion:
> 
> How on earth do you create shadows with prman???  The basic idea is
> simple, create a Z-buffer image, use RiMakeShadow() to convert it to a
> shadow map, and use the shadow map in a light source shader with a
> shadow input (shadowspot, etc...).  Everything breaks down at the
> first step though, since it looks like NeXT left out the ability to
> write Z-buffer images!  Thus - no shadows, no photorealism, no
> nothing.  I'm very frustrated about this...
> 
> So has anybody worked out the technique?  I'm completely stumped after
> wasting hours and days trying to get it going.  NeXT's
> vapor-documentation doesn't help of course...
> 
> Shane
> 


You can create your zfile with a call along the lines of:
   RiDisplay("filename.z", "zfile", RI_Z, RI_NULL)

However, I have not yet decided on the best suffix to use, as .z is already  
in use.  I use .zfile instead of .z.

Using the depth mapped file, once you have it, is still no joy!

wick