Quote from: cyphyr on August 09, 2019, 08:55:31 AMI did a quick google of Photoshop Screen math and it came back with this (see attached)
photoshop-blend-modes-explained
All of this is possible with blue nodes although it's a little more complex than just ADD_COLOUR, but as a mental exercise it may yield helpful results.
Just tested it and it works
I didn't catch this! I knew that our functions didn't act exactly like Photoshops filters (like Multiply in TG is an actualy multiplication where Photoshop is more of a subtract/darken) where darks are applied multiplied, and white isn't effecting the layer (in photoshop)
Also about your comment on disagreeing right back, you don't really provide a justified response to my claim. What is your scene? What is it plugging in it? Does it need to be part of the scene entirely or is part of something else built and than applied to the scene? Just like Photoshops documentation on it's filters, they do not show you redundancy, they explain the filters, and leave it to you, because now with a understanding of the filters, you should be able to use them in any means you like.
When what you do with it entirely depends on your end-goal, and the use of it so open it can be used for almost anything, you most certainly do not go into detail about that. You cover it's in and outs, and leave it at that. No anyone can use it any way they like with that understanding. If they still don't understand, THAT's where How To books and Tutorials come into play.