Jim
Thanks for this. I am a total novice in that I’ve only done the Motion tutorials which do not cover mattes and have discovered a tutorial in a book which covers keying rather than making a matte, so it is all up to me to experiment. My background is Qantel HAL so although I have years of animation/compositing experience, I have a totally different way of thinking.
I am able to make a perfect black and white image of the heart beat line and can place it over the background picture/layer. If I switch it on, then it blocks out the background picture, if I switch it off then it is not used at all.
How do I ‘use’ it without seeing it? With HAL this is possible, and it must be posible in Motion too! The other feature I’m missing or have not found yet, is how to be abel to select only one objct/item and say position it by draggin it all over thecanvas, without it decidiing to rather change the objects scale, or select something else. Agaiin with HAL one can easily instruct the system to only allow one to select one item and then you can tell it which aspect you want to alter as well. Any tips?
Thank you in anticipation for getting back to me!
Daisey