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render alpha shadows in blender 2.55 ?

Posted: Tue Nov 30, 2010 9:10 pm
by dasdeck
i followed this tutorial to get my transparent pngs to be transparent objects to place em on the background.
however, the objects still drop a shadow. even turnung the shadows completely off for the material does not do a difference. is this maybe a bug? any help in archiving this?
maybe you have a better idea to bring my textures into this scene ?

here is how it looks.

the rectengular shadows around the knobs should not be there.
only the radial scales should draw.

here is the blender 2.55 file

thanks :)!


Posted: Thu Dec 02, 2010 2:34 am
by paulo_gomes
that shadow is from ambient occlusion.

it doesn't work with environment light raytracing, you can try with environment light approximate and in the material>shadow disable cast approximate.

Posted: Thu Dec 02, 2010 8:40 am
by dasdeck
thanks. i'll try it. do you have a suggestion without disabling rendering features?


ok. i got it. but it was not ambient occlusion, it was environment lighting in the world settings. sad it does not work together. afaict those option add some realism to the rendering ?

thanks agin for helping me!



Posted: Thu Dec 02, 2010 3:57 pm
by paulo_gomes
you can use environment lighting but not the raytrace one, in the gather panel change from raytrace to approximate.