Hello pixelated and welcome to the ArtRage forums
This article from 2017 might be of interest to you: https://www.fespa.com/en/news-media/...-textured-inks

I believe ArtRage uses a form of depth map for paint thickness/hight. Indeed if you want you can export the individual maps used in a layer. Bring up the contextual menu for a layer and choose Export Layer To Channels.
Theoretically you could use the outputted images as texture info in another 3D app, but I’ve never tried this.