Hey there. That bug where the galaxies stick has been really hard for me to reproduce reliably. Ive actually thought ive fixed it multiple times and it keeps popping up.
I'll add a more heavyhanded solution that checks if its active every frame when not in a galaxy to make sure its turned off.
its possible to change the brightness of distant galaxies through the code in the FixedUpdate function of the GalaxyVolume class, And you might get the effects you want by reducing the radius of galaxies generated. I'll add a feature to change the brightness of distant galaxies easier though in the next version to make this easier for you.
I have a custom terrain idea which isn't actually voxels but should let people do similar things to voxels. Its a little weird but ill be slowly working on it.
I'm actually surprised that your computer can support the real time galaxies at all, id recommend the mode where it only does baked galaxies for it normally. If your having performance drops from the baking you can reduce the max gpu cores the baking uses at the bottom of the widget ui.
However i suspect that the slowdown comes from the heavy volumetric galaxy shader covering the screen at the same time. Because the asset is actually baking galaxies constantly in the distance, if that was the thing slowing things down it would be stuttering constantly.
As for the baked galaxies issues, with the rotations and being out of place, id really like to see some videos of the problem so i can understand it a bit better.
The bug where stars are vanishing and not showing the flare effect is concerning. Is there a good way to reproduce it? Ive seen it before but its another one that i thought i'd fixed.
Ill look into temporal reprojection a little but since no one is actually buying the generator im not sure if i can spent too much time on it.
Im going to be going to a web development academy to retrain since this hasn't made any money
However! Thank you for the feedback. Ill try to update this quickly. The temporal re-projection might take longer.