Jello and Water Real-time Physics & Ray Tracing

[@HonestChuckle]

The new Minecraft update is looking pretty good here

[@cavvaldiv5536]

_boing_ This is actually so cool, can't wait to see more :)

[@purplechaos1238]

I love this!!!

[@rafa_br34]

Damn, I wish I had such skills but I can barely render a cube.

[@DanielOakfield]

How cool is that!!!

[@cybxrslash6597]

i wanna go here when i die

[@ChristianStout]

Is this using PhysX for real-time physics?

[@GrantKot]

It's using my own physics engine on CPU. Saving the GPU for rendering tasks.

[@alan83251]

Nice! Would you be able to create large or infinite worlds with this tech and dynamically scale back physics simulation as you increase distance from the camera? Any chance this could be added to Unity or Unreal Engine as a plug-in?

[@GrantKot]

Yes, that is something I've been thinking about. The world could be divided into chunks and the four (or eight if we want huge vertical movement as well) chunks closest to the player are simulated. Adaptive resolution is something I experimented with a little too and is also definitely possible. Plug-in or maybe engine might be further off in the future, only after we release our game. But also, this game is already pretty easy to mod. You can just edit the MagicaVoxel level files, or even material property files and it would just work as everything is physically based. You don't have to worry about baking any shadows as everything is dynamic.

[@unfunnyhumor1573]

Epic

Does this really require nVidia RTX GPU?

[@adeshpoz1167]

Most likely. Considering it says "RTX" in the title.

Well, so do thousands of other videos about things like Minecraft shaders that don't even require nVidia GPU.

[@GrantKot]

Sorry for the confusion, I partly put it there for the algorithm. More people search "RTX" than "raytracing". There is raytracing involved here, but as it's not triangle based, there's no need for the Nvidia kind of RTX. I am on an RTX 2080 though.

[@rherrmann]

@@GrantKot Nice demo, but please don't add more confusion to the terminology... let people learn that RTX and raytracing in general are different things

[@infera1]

Super dope! Coul something like this maybe simpler be in VR? I dream for another particle playroom like chroma lab.

[@GrantKot]

Yeah, I did have an idea for an ant-man like mechanic, where you can hang out with your friends in this world in VR, you can shrink to walk around and "ride the waves" etc. while your friend can be bigger and scoop up/stir the water with you in it. Maybe sometime next year.

[@Wordly_synth]

I recognize that hdri

[@GrantKot]

Cape hill from HDRI Haven

[@wasplay]

Is my laptop's 2060 enough to run such a simulation ?

[@GrantKot]

I think it's quite likely. There are quite a few settings I can expose to scale down the rendering. Like calculating reflections and refractions at half-res, or increasing step size when marching through the volumes. And for the CPU, there will be some settings to lower the particle count. Especially for non-structural stuff, like liquids, you can adjust down the simulation resolution without affecting the overall behavior. 2060 is not bad, being a newer architecture and stuff. I'm on a desktop RTX 2080, base model no overclock etc.

[@wasplay]

@@GrantKot Awesome ! :)

[@dabbopabblo]

avatar the last airbender water benders be like

[@candziiss3012]

I'm just saying you got to talk man

[@GrantKot]

Sorry, I haven't been spending as much time video editing these days. Lots of work to be done these days and coordinating with team members. I did a quick fix to add some background music to this video.

[@ShawarmaBaby]

Is this Unity?

[@GrantKot]

No, currently just C++ and modifying one of the DirectX samples (SimpleInstancing) from Xbox ATG

[@ChristianStout]

@@GrantKot So is it using DXR, or your own raytracing shader?

[@GrantKot]

Christian Stout own shaders