thanks for the reply, it was just a coincidence since I also scanned it with a LixelKity K1 a couple months back. I think this scan definitely looks better with better lighting.
Thats not my dataset. "spirulae" takes the raw images (about 6400ish images with 1400 x 900 pixel). Then "launchedpix" makes the dataset with agisoft metashape. I trained it with gsplat simple_trainer with 6 M splats, 60k steps, and bilateral grid activated.