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Show HN: Immersive Gaussian Splat tour of grace cathedral, San Francisco

vincentwoo.com

31–40 of 67 posts

Re: Show HN: Immersive Gaussian Splat tour of grace cathedral, San Francisco

#31
The Peek mode is insanely good, it reminds me of those exploded views of buildings and "how things work" children books.

The model seems to be having a hard time with the marble floor in the quire (low resolution), is this because of its reflection?

Re: Show HN: Immersive Gaussian Splat tour of grace cathedral, San Francisco

#32
post #19

The Keith Haring altarpiece is a really cool surprise! It's unfortunate that this tour makes it very difficult to see. Really not a fan of this "on rails" presentation style. I understand the angles matter when viewing a splat, but come on.

You can also walk freely FPS style with WASD and mouse-dragging to look around.

I only ever look at HN on a phone, and I'm pretty sure I'm in the majority.

Bad mobile support is a sore spot for any "Show HN" announcement.

Re: Show HN: Immersive Gaussian Splat tour of grace cathedral, San Francisco

#36
The cathedral is the star of the show, but I found myself more fascinated by all the incidental little details captured in this. Like the trees and the buildings nearby, the basketball court, the little solar panel on the side, the apartment towers.

It's like seeing the promise of Google Street View realized.

The technology is in such an early stage and it already slaps this hard.

Wonder what the next steps are for this tech? "Un-splatting" optimizations to convert things like flat surfaces into classic rigid textured geometry? Factoring the lighting away from the geometry? Filling the pipeline with AI tooling - segmentation to remove the "variables" like humans automatically, generative AI to fill in the missing non-semantic details based on the surroundings, more generative AI to "port" the data from things like public high resolution images of plaques or other undercaptured details into the scene?

Seeing this kind of reconstruction now makes me very excited for what the 3D environments of the future are going to be like.

Re: Show HN: Immersive Gaussian Splat tour of grace cathedral, San Francisco

#37

I like the moving cars. They're copies of the stopped ones right? Adds a good effect.

Yes. They're Gaussian splats like the rest of the scene. PlayCanvas has a global sort so they render correctly regardless of camera angle.

Re: Show HN: Immersive Gaussian Splat tour of grace cathedral, San Francisco

#38

Did you animate the cars separately? That really did a lot to add to the immersion (and the sound effects too). If nothing moved I think the effect would be significantly diminished.

Yes, the cars are separated out and procedurally animated. They're splats, like the rest of the scene. Easily done in PlayCanvas - simple but effective!

Re: Show HN: Immersive Gaussian Splat tour of grace cathedral, San Francisco

#39

The cathedral is the star of the show, but I found myself more fascinated by all the incidental little details captured in this. Like the trees and the buildings nearby, the basketball court, the little solar panel on the side, the apartment towers. It's like seeing the promise of Google Street View realized. The technology is in such an early stage and it already slaps this hard. Wonder what the next steps are for t…

Apple (“streets”) Maps uses that tech in the latest beta. (Apple Maps is generally better than google maps apart for the data, tbh)

Re: Show HN: Immersive Gaussian Splat tour of grace cathedral, San Francisco

#40

The cathedral is the star of the show, but I found myself more fascinated by all the incidental little details captured in this. Like the trees and the buildings nearby, the basketball court, the little solar panel on the side, the apartment towers. It's like seeing the promise of Google Street View realized. The technology is in such an early stage and it already slaps this hard. Wonder what the next steps are for t…

One other little easter egg you may not have noticed. There's an American flag gently fluttering in the breeze on top of a nearby building. We were discussing whether to adds some birds as well, but that never made the final cut. You ask about factoring lighting away from the scene - actually, PlayCanvas can already do relighting and shadow-casting for gaussian splat-based scenes:

https://playcanvas.com/examples/#/gaussian-splatting/relight...

Some kind of day/night toggle would have been another great feature...but again, it didn't make the final cut of the experience. Maybe a HD Remix is needed. :o)

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