I'm going to take some time to show you all various genetic material in REALISTIC horses, as well as what genes don't "coexist" or which genes (such as OWLS) can actually cause death in a foal.
Here, we have SORREL and it's available dilutes (palomino and cremello). Also note I didn't include many shades of sorrel/chestnut, even though there are more (especially in Palomino -- such as 'chocolate' palomino).
If you have a material request, please message me and I'll get started right away!
YOU MAY NOT alter or redistribute without my direct permission. Artwork by me, created in Paint Tool SAI with a Wacom Bamboo Splash tablet.