Hi Simon,
This is something that has come up previously, but it has also worked properly previously.
The avi in the opacity channel allows crawl in, which can be nicely timed.
Unfortunately, viewport is not updating for animation, nor basic viewing.
I have attached the .car with the moviemask.avi file. Note the .avi file is rotated 90 deg. in the .car file in order to align with the UVs.
Separate question ( top image) : We have Alpha image as an option for the first input. The alpha function is not working. The .png does have transparancy. If Alpha image is offered, it should work in the elected channel, yes?
This would allow an alpha image that can be revealed by an avi in the opacity channel.
Thank you,
Rick