M3 Ultra Support

[lizGYM66]

Hey,

Does there need to be an update for Arnold to use the Apple M3 Ultra chip in the MacStudio? I just got one but Arnold is very laggy with it. V-Ray and Redshift are fine.

Just wondering 🙂

[peter_horvath]

Laggy compared to a previous (possibly M1 or M2) mac and same arnold/c4dtoa version?

[lizGYM66]

Well I've been using it on and off and a 2019 MacPro and a I9 14900KF PC.

On the Studio, what's noticeable is the viewport performance. In V-Ray and Corona, the viewport is just fine with V-Ray being the smoothest. But with Arnold the viewport is always a bit laggy even if you hold back some cores from the IPR. It was probably the same on the MacPro but I didn't notice it on the PC as I was using GPU there.

[peter_horvath]

Do you have OIDN denoiser enabled in you scene? If so, can you check what if you disable or remove it?

[lizGYM66]

Disabling doesn't make much difference, and this is just a scene with a cube and default dome light.

[xfan10]

delete the denoiser imager under Render Settings>Arnold Render tab in the last section under Imagers. Your viewport will triple IPR mode speed.