Re: transparency & specularity

[James W. W. <os...@jw...>]

On Apr 4, 2004, at 11:50 PM, Frank C wrote:

> Is a global switch really necessary? Quesa/QD3D already allows you to 
> control Phong shading per-group, so it's already possible to turn off 
> specularity on a per-object basis (regardless if they're transparent 
> or not). You could also use the specular colour as a hint, and turn 
> off the extra processing when it's pure black, since the end result 
> would be the same.

In the current design, all the transparent triangles are saved in a 
buffer and drawn at the end of the rendering pass.  There is no 
indication of whether Phong illumination was on or off when a 
particular triangle was added to the buffer, though it wouldn't be 
difficult to add that.  And of course some triangles in the buffer may 
have black specular color and some not.
--
<http://www.jwwalker.com/>