From what I can tell, shadows are either “on” or “off” and cannot be made to fade proportionally as an object fades. This is consistent with transparent objects casting solid shadows - presumably because the system is casting shadows, not ray tracing them. This is a problem when fading out an object since the shadow pop on or off.
Is this correct? If so, does anybody have any ideals of how I might fake a shadow fade? I’ve tried adjusting the timing of when a shadow pops on or off, and that helps a little bit in masking the “pop.” But I’d like to do better if I can.