Thanks for the tip on ASTC, devel.bmad, that’s working great for me.
I started over with the stock FPS demo and I think I’ve found the minimal set of changes to make it run judder-free, at least for me:
- Change the main room texture (“Cube material”) to be unlit
- Hide the skybox
I’m able to leave all the other geometry and settings and it works fine. If either the skybox or the room’s material is lit, the judder comes back. Note that the other geometry (the boxes, projectiles, and the character’s arms) are still lit, only the floor and walls are unlit.
Thanks again for the help!