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Tag Archives: display tag

If I have a group of objects, I often want to adjust their overall visibility without seeing an “x-ray” effect, where I see all their internal structures. I want to just have a semi-transparent group of objects. To do this, I can animate their transparency with the Display Tag, but the group also needs a Compositing Tag with Seen by Transparency turned OFF.


In this image, the torus is seen behind the other transparent objects, but we don’t see the internal collisions of the other objects.


When using the display tag to fade an object out, I kept getting a very not-smooth ‘pop’ in brightness of the underlying object as soon as the above object reached zero transparency. The lower object was darker until we finally hit zero transparency on the occluding object, then the lower object was suddenly bright.

Actual issue: The problem was that the lower object was reflective, and it’s appearance had two layers of the fading object applied to it: 1: the occluding object’s transparency, and 2: the reflection of the occluding object.

Fix: Add a Compositing┬átag to the occluding object and turn off “seen by reflection”. This only works, of course, if you don’t need the occluding object to be seen in the reflection of the shiny object.

Technically, I don’t understand why I have to do this. It still seems that a gentle fade should always end in a gentle fade, even if I’m seeing through the occluding object twice (once through it, once through the reflection of it in my shiny object). But I guess I’ll figure out why it’s this way later.