Problem with raytrace transparency and alpha . BUG???

[Valter]

How can I solve this problem? What's doing wrong?? Is it a bug??

thanks

excuse my english

[UnCommonGrafx]

Actually, this is an old bug. Look around for others' comments on it.
No fixes.

[wacom]

I think I've ran into this too...

The best solution is to render out the Alpha as a seperate buffer without using any raytracing/radiosity. I've also noticed on my setup that if I give the surface any additive tranceparency under the advanced tab I get the alpha right with the image...but my render times increase.

Don't hold me to this...I hope I'm not way off the mark with my answeres...