Hey all, (@nathanletwory maybe?)
I’m on a job right now, and it’s crunch time (like a cple hours 
) and I’m getting what looks like low-resolution image zoom way in.
Is this with Rhino Render or with Raytraced?
Raytraced, thx for the super quick response! I am probably going to have to go to Twinmotion after anyway at this point, but if theres a chance i can stay in Rhino, it would be grt. Thx
Tools > Options > Rhino Render > Viewport Sharpness, set slider fully to right (pixel perfect)
Trying now
Don’t forget to toggle away from Raytraced and back to it after making the change.
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Booyah, thanks as always, sir 
You’re lucky I looked at Discourse, I’m about to sleep (: (in 30-ish minutes).
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Quick followup - I have RTX 4080 and 3090 - Should I be using Cuda or Optix?
In Rhino 8 OptiX may be the faster option, but it won’t be huge differences. Once you are done with your crunch session I suggest you take a couple of your typical files and do some render tests.
I personally like to turn off all post effects during the rendering in both Rhino Render and Raytraced. That makes it so that rendering is faster, less CPU cycles wasted. Only enable the post-effects when the rendering is completed.
Also I like to turn off the ground plane and use a manual plane instead. The automatic ground plane is huuuuge and will mess with the spatial partitioning causing a small penalty. And the shadows-only groundplane makes things even worse - quite considerably.
shadows-only groundplane: 23s
manual plane / groundplane with material: 16s (in this case due to adaptive sampling same speed)
no plane: 3s
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Excellent, much obliged!
Oh, also, if you don’t mind errors that people can’t see (typically) you can play with Tools > Options > Advanced, type in Search box Adaptive
By default the error margin (threshold) is set to 1% (0.01, probably shows as a looong number, ignore that, it is 0.01). Setting it to something larger can give considerable faster renders. With denoise on it is probably still going to give you good results that you can use.
300 spheres (not spartans) on a ground plane with default material.
Threshold set to 0.05 (error margin 5%), with denoise: 5s
Threshold set to 0.01 (error margin 1%), with denoise: 34s
Play with the threshold to see what your sweet spot is for speed and acceptable render output.
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Take me to church!