Quote - > Quote - Compare this with the earlier one. There is a thin box under the flattened sphere. What is different?

There's a shadow on the bottom half of the sphere in the second image.

Right!

It would appear that when IDL sends out a ray from the bottom of a sphere, it passes right through the Ground without realizing it, and picks up light from the IBL, when it should not.

When I put a flat box there, it saw the box, same as it should have seen the ground.

Poser 8 Ground seems very buggy. I have found more than one situation where Poser seemed unaware that the ground exists.

For example. Load a couple props. Go into the material room. Click on one prop - its material gets selected into the material room display. Click on another prop - that one gets selected.

Now click on the ground. It selects the Background material instead of the Ground material.

It acts like the Ground isn't there.

Uli told me the Ground is not real geometry - it is procedural. It seems that not all the parts of Poser are procedural-geometry aware.

They should have got rid of that Ground and just used a prop for real. These problems wouldn't exist.

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)