Why does a 3D solid sometimes disappear when I rotate the view?

[indiancad]

Have you ever rotated a 3D model and suddenly part of the solid seems to disappear?

In many cases, the geometry is fine and the issue is related to the visual style, clipping, or view direction.

When this happens, I first switch to Shaded with Edges and use 3DORBIT to inspect the model from different angles. I also check whether a clipping plane or unusual camera/view setting is affecting the display.

It’s easy to think the solid is damaged when it’s actually just a viewing issue.

Have you run into this before? What was causing it in your case?