Can not use in Vision Pro

[suibian1976]

I would like to use your excellent plugin in vision pro, but vision pro only seems to support shader graphs so the image is all black after import. Also I see that your code is very tightly coupled with shader code so it's hard to convert to shader graph, do you know if there's any way to use your plugin in vision pro?

[mlavik1]

Hi! I don't own any Apple devices, so this is all new to me, though I did hear something about this once..

Using shader graph for direct volume rendering (using raymarching) doesn't sound very practical, and I'm not even sure if it would be possible.

It's possible (and maybe even better) to do volume rendering through compute shaders, and I believe that should be possible on VisionOS as well.
It would likely require a bit of work to port the whole plugin to use compute shaders though 😅 I'm afraid I won't have time to do that soon, and for compatibility reasons (WebGL, etc.) it might not be something I'd like to change yet. However, if you're up for the challenge then you could use the shadow volume implementation as a reference: https://github.com/mlavik1/UnityVolumeRendering/blob/master/Assets/Resources/ShadowVolume.compute

It basically does volume rendering in a compute shader :) It outputs a 3D texture though, while you'd want to update a 2D texture that you'll render to screen.