I can't show anything at the moment, but I'm doing an 8k Skybox render on a 12-core Xeon and have plenty of RAM (64GB) and the render I'm doing has been going for 183 hours so far, and based on it being about 2/3rds done I estimate it will need another 90+ hours to finish. Not sure if I overdid my render settings, but I'll post some of my settings to see if I'm way off on something.
Render Quality
Micropoly detail = 0.8
Anti-aliasing = 8
Defer atmo/cloud = On
Sampling:
Robust adaptive sampler (BETA) = On
Customise sampling = On
First sampling level = 1/64
Pixel noise threshold = 0.0125
GI Settings:
Prepass Tab:
GI cache detail = 2
GI sample quality = 2
GI blur radius = 8
Supersample prepass = On
Image Pass Tab:
GI surface details = On (All Defaults, 1,1,24)
Exaggerate surface details = On (All defaults, 1,1,24)
GI in Clouds Tab:
Cloud GI quality = Still / Medium
Other Info:
Image width = 8,000 x 4,000
Soft Shadows = On (diameter = 4, samples = 18)
Atmosphere samples = 16
I have 5 Cloud layers, all are Cloud layer v2, and they range from .002 sharpness up to 32.
All 5 cloud layers have a Quality setting of 1.0 and the Acceleration cache is set to None on all.
There is also a Terrain rendering in this image with some textures, tree models, and Daniil erosion.
I'm guessing I set the pixel noise threshold too fine (0.0125) but I have God Rays in this render and felt like going to a bigger number would compromise quality. I don't want to kill the render and retry the settings because I've already got too many hours invested in this render. I wish there was a way to save the render progress in these types of situations, because if I had a power outage I would lose all the render progress. Maybe I'm hinting at a feature request.
Anyways when this render finishes I can try some setting adjustments.
Thanks,
Derek