I see what you mean with those. Looking at the mc6 of the t-shirt, it sets the diffuse color to "value 0.937255 0.937255 0.937255" I don't know exactly that what translates into, but with all 3 numbers being the same, it's some kind of gray.  I wonder if something happened in one of the updates. I had used that shirt before, but I used one of Ghostship's cloth shaders with it, which makes me think it was acting up then and the scene I was working with was rendered in Poser 11. I'm going to see if I have an old copy and compare it to the latest version to see if it's changed

---

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