Ability to compare Slot 1 with Slot 2 on the same render window with a divider line that I can drag back and forth over the preview window to reveal image A / B. This would make comparing tweaks much better.
Ability to fade in 3D objects (so not using compositor) like in Post Production when animating the opacity of a an image. I know I can animate the visibility tracks in an ON/OFF way and also can animate a material so it fades out but that includes the internals of the object in the fading (Z depth?) which I don’t want. What I want is the ability to fade in an object like in Premiere Pro, its either solid or semi transparent across the object without being able to see back faces.
Enable or disable keys for scene layers during animation? I have a huge scene which is separated into layers for easier working on the models. However in animation there are layers that should not be visible at the start of the animation but become visible later on. e.g. I have a car that is on layer 2 that animates moving, I don’t want this car visible on frames 0 to 200 but to have it appear on frames 201 to 500. Currently I render frame ranges and when that is done I hide / unhide layers and start the render again. This is not very efficient and I would rather not animate thousands of camera/visibility tracks just to achieve what I want.
Batch render. It is possible to render frame ranges of a scene, send that to a render queue then make changes to the scene and send that to a render queue. Once I have done this several times for different shots, layers and even different scenes I can tell Blender to run the queue which might have 6 animations in it. With this, later items in the queue could use images from previous items in the queue as materials, backgrounds etc. I can then let all these render over night and have 6 animations when I wake up.
Maybe some of this is already possible or that addons exist.