transparent background possible?

Hi Alan.
Thanks for your help. I think I will program an anti alias converter for myself, that solves that problem. Because what I miss is, that if the background is transparent, and anti-alias is on, then the edges could also merge with the background, but instead of changing their color, you only need to change the transparency of the pixel. Then you can use the resulting bmp with any new background.
Thanks, Rainer.

Hi.
When I set the background to black (RGB: 0,0,0) and have a object in front of it, which is not black and render the image to a bmp file, and set afterwards the color black in the bmp file to transparent, then there is still a small shadow around my object. I asume that this happens, because in the rendering process, the background is melted with the edges of the 3D object, to make a smoth transit. Becuase of that, the edges of the object are nearly black, but not completely =] black shadow. Is it possible to disable this feature? Thanks Rainer.
P.S.: I hope you understand my bad english.

I don’t believe there is anything that can be done except make make sure you aren’t anti-aliasing when you render.

Richard

Welcome to 3dc.

Turning off anti-aliasing does remove this problem but two suggestions ….

Don’t use black for the background – some objects might be in dark shadow which can lead to problems when you cut them from the background – try 255,0,255 (rgb)

Also render as large as possible (1600X1200 ?) then after the object has been cut you can reduce it in size which will help smooth the edges.