Let's be clear: I don't have the ambient value on the visible prop (the lampshade) at all.

Any time I have used ambient on a prop itself, it whites out the prop, even if the level is 1.

In this case, the problem is probably as much with translucence as with ambient. Translucence seems to make the entire material equal in how much light gets through.

But I had to crank up the ball's ambient value really high in order to get anything close to a realistic effect in terms of the light it was throwing.

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Hardware: AMD Ryzen 9 3900X/MSI MAG570 Tomahawk X570/Zotac Geforce GTX 1650 Super 4GB/32GB OLOy RAM

Software: Windows 10 Professional/Poser Pro 11/Photoshop/Postworkshop 3