I want to make a task that does essentially 2 things.

It needs to take a supplied linear EXR sequence and convert it to a 16bit LZW Tiff sequence. The colorspace of the Tiff sequence should be rec709.

Can I do this with a LUT? - gamma 2.2 isn’t sufficient because the blacks are too different.

Secondly I want to unpremultiply the alpha channel on the EXRs before they are converted over to Tiff. Is there some way I can do this with the compositing tools in Draft?

Thanks for your thoughts.

R

This is not currently possible, but it is on our wish list for future development.

I think we covered most of this in Draft Beta 10.

To convert img from linear to rec709 color space:lut = Draft.LUT.CreateRec709() lut.Apply( img )

To unpremultiply by alpha: img.Unpremultiply()