Aim: to have objects disappear and reappear during 3D and 2D animation. Currently my movies just have simple slide-in and fade-out actions for text and flat images, plus a 3D rotating logo, overall a bit like fancy PowerPoint shows.
Four related questions: (links to docs or tuts welcome!)
What is the approved technique for making an object fade-out or -in?
This provoked the question: can I have a single RGB ‘background’ node or property and reference it across several different text materials?
I expected the Alpha property in the BSDF to control transparency but it just works as an on/off. So I currently use a mixer node which gives text a nice fade-in/fade-out between keyframes. It was tricky getting the text to fade out exactly against the background, if does not quite match a ‘ghost’ remains. Right now I clumsily fade out by mixing each to its own RGB node which is set to the default background level ( #404040).
What is the approved method for adding and removing objects from the ‘stage’ during an animation?
Currently when an object fades out, I park it off-stage (outside the camera view), and bring in others on-stage using one-frame move transitions, and then fade them in. The scene is getting bit cluttered. I tried animate the ‘visibility’ of an object like in the Scene tree UI view or is an object’s lifetime always the same as it’s scene’s lifetime?
(related to #1) What it the generic method for making an animated ‘variable’ globally accessible across several different nodes? Is this done with a DRVER?
Thanks. I will try to collate the answers and feed them back into Blender Docs.