Are there standards for orientation of a splat?

[rowild]

First of all I would like to express my gratitude and fascination with this project! Simply amazing! What a pity that a day only has 24 hours... :-)

I get my splats mainly from Lumalabs (drone flights around old castles). Then I pull the splats into LumaLabs to do some cleanup work. And eventually I view them in GaussianSplats3D ... where they are upside down. This is what puzzles me a bit, because what Lumalabs (or Polycam, KiriEngine, etc) export, is shown properly SuperSplat (and also in Blender, when it comes to point clouds).

May I ask what is the decision being this? I am not familiar with other 3D software like Maya or UnRealEngine – does GaussianSplats3d adopt their orientation standards?

What would be the easiest way to prepare a model for GaussianSplats3d? Currently I export my models from SuperSplat 180 degree turn around in z-axis. But of course it would be great, if there was some kind of standard. Honestly, to me it seems this might be possibly a bug?

I uploaded 3 images that hopefully better explain what I try to say... Thank you!

[rowild]

Anybody?

[mkkellogg]

Another developer encountered a similar issue a while back, and at the time I discovered Super Splat had some additional logic to invert the scene when it imports it. The issue can be found here: #186. Are you exporting your .ply compressed or uncompressed?