I'm going to add to the confusion here.

I got the same error message as Rhia's second with an RTX 2060 when I tried to do a scene with a fog cube and an image on the background shader

---

Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
Check out my store here or my free stuff here
I use Poser 13 and win 10