I had no idea SOG was being used this way, so cool! I'm busy working on V3 if there's anything you think we should include.
That reminds we, we had really weird results with splat-transform .sog output, when measuring the references for KISS-GS a couple months back. Why is the .sog curve dipping in quality when adding more primitives?
It's the "POPSpa + .sog" curve here, in the first Figure: https://arxiv.org/html/2608.26948v1
Always wanted to go back and measure with the latest splat-transform and find whats going on there.
The issue you saw had been addressed in 1.7.0. We were generating codebooks for color and scale using k-means, which would result in bad values sometimes for the extremes. In 1.7.0 we switched to an optimal quantiser with outlier handling. It was actually surprisingly hard to get this right.
I just got opus to valid this now and it found another issue with our scale codebook gen, which I will fix now. Huzzzah!