Hey OceanTS…just did this test you mentioned and low and behold…yeah I now have the colour picker back. I didn’t have any levels with any fog as I have removed it for this level I’m in the middle of doing, and no other levels in the game I’m making had any fog at all. So I made a dummy level, added in the fog from the actors, checked and it wasn’t ticked, the Volumetric Fog, but I then created a dummy material…voila! So I checked the other master material I have made, added a colour tint and I now have the colour wheel.
Thanks heaps for this quirky fix but yep…worked for me!
Regards
Shez