Hi Ingo,
Thanks for getting these HD mods out so quickly after Space Age. You've done a great job, especially with the ability to pick and choose textures to save vram!
There's a visual bug with the volcanic cracks that only appears at night. I've seen this issue for a couple of months. The transitions from volcanic cracks to other textures glows red. It looks like glowing red squares bordering the volcanic cracks. It's not visible during the day and seems to pop in suddenly during the transition to night. When I disable the volcanic cracks using the new toggle options the problem goes away.
It is quite visible at night when looking at the lava areas, but if you can't replicate the bug, I can send a picture.
Thanks