A fun little game with a creative concept, especially given your time constraint.
Unfortunately, I think my version wasn't working properly, as the sweep flashed between fully green and fully black without any of the dithering effect, making it even harder to locate ships. And, honestly, I don't see why you can't just render the green sweep under the black ships and forgo the whole shader business altogether.
G'day, cheers for the feedback.
I didn't end up getting a mixed effect so the 'trail' is just alternating (as per the screenshot). Was keen to make it prettier but was a bridge too far in the time. If yours isn't like the screenshot it might be an issue, possibly related to support for compute shaders.
It is definitely something that could have been done trivially with a few spirits and maybe 20 minutes of coding... It was just a personal desire to explore compute shaders. It really could have been done better as a standard shader but was a vehicle for understanding the compute shader pipeline. Just glad you managed some enjoyment out of it!
