Do you mean that the hardware acceleration already does this, or that it would be simpler to modify the hardware acceleration?  I want to create a "billboard" effect, such as described here in the Alice documentation:

http://www.alice.org/advancedtutorial/#billboarding

I can't see a way to do that now in either the software or hardware renderer, because it always will draw a rectangular black background for a non-rectangular image.

Thanks for the reply.
 
squeak-dev at lists.squeakfoundation.org wrote:
> Thanks for the offer, but in order to add translucency to the builtinrenderer you'd have to understand a little more than the average 3D
renderer. The builtin stuff is severely non-standard which makes it
both, fast and compact (we don't even have a z-buffer...). So unless
you've written a few rasterizers yourself, understand a bit about
analytic rendering and are willing to spent at least a month digging in
these issues I guess it will be simpler for you to just use the hardware
acceleration.

Cheers,
  - Andreas

> -----Original Message-----
> From: squeak-dev-admin at lists.squeakfoundation.org 
> [mailto:squeak-dev-admin at lists.squeakfoundation.org] On 
> Behalf Of yampa at mindspring.com
> Sent: Sunday, March 17, 2002 6:46 AM
> To: squeak-dev at lists.squeakfoundation.org
> Subject: Re: translucent B3DSceneObjects with texture?
> 
> 
> I would like this as well.  I don't know much about the 
> internals of the rendering engine, but I am willing to help 
> do what I can.
> 
> - Doug R.
> 
> 
> squeak-dev at lists.squeakfoundation.org wrote:
> > Hi--
> 
> 	Is it possible to create a B3DSceneObject which has a 
> texture (e.g.,
> >from a JPEG) but is also translucent? I'd like to extend Luciano's
> facial animation work to show internal muscles; I'd like to use
> translucent skin.
> 
> 
>         thanks,
> 
> -C
> 
> --
> Craig Latta
> composer and computer scientist
> craig.latta at netjam.org
> www.netjam.org
> crl at watson.ibm.com
> To quote is human, to paraphrase divine.
> 
> 
>