Ply export fixes#6
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May 15, 2026 10:29
transform gaussian rotations to world space on PLY export, apply rotation and translation when aligning gaussian means to view, don't align to view by default
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First of all, thanks for making this research available. Recursively passing rendering error into the model is a really neat idea.
I noticed an issue in the PLY export where the gaussian rotations are in the camera space for each frame, not the world space. This causes the scene in the exported PLY to have degraded image quality compared to the results in the paper. The middle frame's camera space happens to correspond to world space, so that particular view looks mostly correct. This PR makes the following changes:
Here are some renders of the exported PLY from the dl3dv_16v_540x960 demo dataset before and after the changes. The renders are generated with the render_ply.py script.
view 8, before
view 8, after
view 0, before
view 0, after
