BlueSky did not let me have two videos in the same post. So here's the OIT video.

An interesting observation we had is that OIT (enabled by setting "Blend Mode" to 3 in the config) seems to help background reconstruction and overall densification. Videos show the first 3K training iterations using hybrid vs. order-independent transparency.

Here are examples using (0) hybrid transparency with K=16, (1) alpha blending of the 4 first fragments per-pixel, (2) alpha blending in "global" depth-ordering, and (3) order-independent transparency. Model was trained using the settings as in (0).

Via the "Viewer Config" (F3), you can switch to rendering depth maps and expanding the advanced renderer config allows you to switch between expected (shown here) and median depth.

By modifying the "Principal Point" and/or "Focal Length" you can create fun images like the one below. You can even do this while watching your Gaussians train if you set TRAINING.GUI.ACTIVATE to true in the config file.

And yes, you could in theory train on images like this.

We recently released the code for "Efficient Perspective-Correct 3D Gaussian Splatting Using Hybrid Transparency"

Project Page: fhahlbohm.github.io/htgs/
Code: github.com/nerficg-proj...