OTOY Forums

Hi..is it possible render a model subject with alpha channel? Without background... Thanks

you have to make a luma matte and use that to remove the BG.

ooh, could you explain how to do this?

Big thanks
Jack

essentially just set all materials to emit white, and set background to black.

let it cook till it's in good shape, maybe make it a double resolution just to help get clean edges,

Save that image, and then use in your compositing application as a luma matte.

also, set any materials you have that you don't want included in the alpha pass to be black, and make them textured emitters black with 0-power.

Change your display method to Direct lighting ( for faster results ) with a bottomed out pathtracing and AO dist.

thank you for the tips bro.

However, half transparent and blurred object will not give a good mask, I fear... ?

No they won't. I hope that proper alpha comes in v6