SOS
I imported an allembic file into blender. When I set the alpha to 0 to make it transparent it turns black and not transparent with cycles.
I wanted to animate the visibility with a mixer node but any setting I touch with the alpha to make it transparent makes it render black. Can’t figure it out.
In eeVee or in Cycles you have to include a transparency node…Leave Alpha set to 1, 0=opaque.
In eeVee in settings set Blend Mode to anything but Clip. This node tree will work in cycles as well.
In the case of Cycles, you’re running out of transparency bounces. Notice how the upper sheets disappear, it’s just the complicated bottom piece that turns black. Cycles isn’t well suited to doing transparency this way. If you don’t need it to fade out, you can just keyframe the render visibility instead.