[littlestymaar]

I couldn't find any details about the migration on either links but it looks like they make massive use of Nvidia-specific features, so even with exactly the same performances it would make total sense to use Cuda just because the tooling is more mature.

[pjmlp]

The video presentation at GTC clearly discusses it.

They moved into Optix 7 as backend.

[littlestymaar]

The video being almost two hours long, I'm not surprised I missed it when skimming. Do you know by chance at which point of the video it is discussed?

[pjmlp]

https://youtu.be/Qfy6CTaSHcc?t=932

[littlestymaar]

Thanks. But I don't see how this fits with your previous statement:

> Badly, OctaneRender had moved away from Vulkan into CUDA, because they found out that Vulkan compute wasn't at the level that they wanted.

They mostly talk about Vulkan+Cuda interop which isn't really supported, and they explicitly said they consider rewriting everything using Vulkan to get rid of this issue. So from what I understand, they are still pretty bullish on Vulkan, but it will require a lot of work and it will take some time (“but probably won't be this year”).

[pjmlp]

Optix doesn't do Vulkan and I doubt that NVidia will ever bother, and OTOY most likely will rather use they resources elsewhere like the new Metal render.

[littlestymaar]

> and OTOY most likely will rather use they resources elsewhere like the new Metal render.

Maybe you're right, and this guy is wrong. But you gotta admit that contradicting the speaker of the video you're using as a source is unusual to say the least.