What settings are you using for AA and adapative?
the problem not in samples count but it is taking so long to clean up the noise and when i use the denoiser make textures blury
indirect samples need to be calculated faster i think in the upcoming versions
i think he has mentioned what i ment at the end of the video
arnold gpu beta still struggle with interior scenes cause most of it counts on the indirect samples
I believe it will be great if it solved in the upcoming versions
I've noticed the same things in my tests. I have a 2080TI using Houdini 17.5 and it takes forever to clean up the noise on the indirect samples.