This is more realistic. Even a dull (not shiny) black ball reflects some light.

So how did I do this? I used a different model for the reflection of light. This model is called specular reflection.

This is a dull one. The specular reflection is weak and spread out.

I'll fix that in a second.

---

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)