4090 struggling
john_doe_official
Posts: 0
Windows 11
64GB of RAM
AMD Ryzen 9 7950x 16-Core ~4.5GHz
RTX 4090 Using Latest Nvidia Drivers
The initialization time is usually around 6 minutes, (blank canvas) and once it starts the renders take a while to reach 100% (between 10 and 20 minutes).
You'd think that's not that bad, but that's only two characters in a scene, with no props or backgrounds included. And keep in mind, the 4090 packs 24GB of VRAM.
There must be something I'm missing... help?
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It is hard to evaluate render times. It could be due to lightning, or surfaces that have problems converting. There can be a smaller area that is causing the longer render time. How many samples does it do?
Regarding the startup time, try to look in the log (Help > Troubleshooting > View Log FIle) to see which operations that take that long.
Render time is dependant on a lot of factors but those times do look on the long side.
In the commons there's an Iray benchmarking thread, you could try that and see how your 4090 stacks up for init and render times.
Other than that check the usual, temps ok? Other apps or games running as expected? Anything else running in the background?
For reference just did some quick checks with a 13700k, 4090, 64gb and nvme drive using the studio beta.
Launch studio to a blank scene 10 secs. Viewport render single G8, clothes and hair to 100% with default lights 30 secs. Clear scene and go back to blank start scene 20 secs. Render two random naked full length figures, G8.1 and G9 both with HD 60 secs. Render times include init times.
What version of Studio? What does the log say? (Help -> Troubleshooting -> View Log File)
Those times indicate the 4090 isn't being used.
ETA - I may be wrong, but I don't think the Iray engine in the current release build supports the 40xx cards - you may need to use the public beta.
The 4090 runs without issue in the current release but the beta is quicker by upto 20% in my limited testing.
Noted - thanks!
I also have an RTX 4090, and I'm experiencing the same issue. I have 3 characters on the screen, and my iray preview doesn't even load, let alone render. If I click to render, the render screen goes all black.
What does the DAZ Studio log file say?
Even with my RTX 3090, some scenes are painfully slow to render until I do some remedial work. Looking in the log file can tell you if there are things like thousands of emitter surfaces, huge, complex geometry, etc.
Here are some things I have found that slowed renders that I was able to fix, myself.
1) Tons of emitters: look in the log where the render is "winding up" -- that is, when all the prep work is being done. Look for the entry about Light Sources. If you see hundreds or thousands, there may be a complex, modeled mesh object with surfaces set to emitter. Look for likely suspects like light bulbs, instrument panels with glowing bits, etc. I even found one character that had eyelashes set to be emissive surfaces -- and they were fantastically complex, so thousands of emitters!
2) Lots of refractive surfaces: look at windows, cabinets with glass doors, etc. Sometimes the glass shader the creator chose is not a good fit with Iray. In those cases, I find the surface and use the Iray glass shader that comes standard with DAZ Studio. That can fix a ton of rendering problems.
3) 3DLight materials: I have found lots of 3Dlight surfaces in great products with the Ambient channel set to a value to "brighten" the appearance of the material. Iray converts these to emitters! Again, they can be a huge hit to render time. I use the Iray Uber shader on these surfaces, then set the Emissive channel to black: 0,0,0
That's my quick checklist for slow renders.
Cheers,
Olo