Huh, this is exceedingly strange — especially that it's happening in both games. If you don't mind me asking, what sort of GPU do you have? The third party lighting library I used for the PAGAN games sometimes has serious issues on lower power GPUs (which is a big part of the reason I stopped using it when I started working on HEXCRAFT).
I'm playing the games in Bootcamp on an older Macbook, so maybe the integrated graphics card is the issue. It's an Intel HD Graphics 4000 1536 MB. Thanks for responding so quickly, sorry I wasn't as prompt. Loved the little bit I got through in Pagan 3 in spite of the graphics issue, congrats on releasing HEXCRAFT :)