How to assign one png bitmap as base color+opacity?

[pproestos]

As you see in the picture, I clone the same png twice and for the one

I assign to opacity map I check these two options to enable it's transparency.

My question is:

Instead to clone it, is it possible to do this with one only bitmap?

Using color correct or other option...

[Stephen.Blair · Accepted solution]

You have two options:

• copy the bitmap, and set one to have it's RGB output to grayscale alpha
• use the OSL BitmapLookup instead, which has separate Alpha output

[pproestos]

.I used OSL. What a great material... thx Stephen! 🙂

[pproestos]

I exprerimented a little and I found also that if I wire beween bitmap and opacity map a Color Correction map with all channels set to Alpha, does also the result I seek...