Working with DPX + LUT in AE

[Brett Harding]

Premultiplied (assuming you are referring to “Color” setting under Video Output in the Output Module Settings).

Under Interpret Footage, Alpha options are grayed out.

[Chris Wright]

is there any way you can reduce the project file and attach it here? I tried several things with feathered masks and alphas and couldn’t re-create your “bug”

And DPX does support RGB+Alpha btw 🙂