Chaos Corona for 3ds Max > [Max] I need help!

Rendering performance x Scene optimization

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wezzex:
Hi guys, my first time posting here :)

I'd like some help in order to discuss and better understand how could I create a optimization check for interior scenes (and exterior scenes).

I've been working in this one lately, and noticed it has taken slighty more time to render than the usual scenes I've already worked in the past, and it has basically only simple geometries, which gets me worried because it will need lots of high polygons block once lightning and materials are setup. I had checked all materials (nothing complex), lightning setup is quite simple (enviroment + sun) and denoising on 3.5 with a 4:3 ratio (1080x1350) and is taking almost 30min to render. Is this normal?

Not really sure if is because it has too much glass windows.

Please find attached my pc setup and scene stats.

Thanks a lot in advance, any suggestions or feedbacks are more than welcome.

maru:
5700X is not a high-end CPU, so 30 minutes for a reasonable quality may be expected.

If you'd like, you can contact us and send us a scene (archived with all assets) at https://support.chaos.com/hc/en-us/requests/new

Off the top of my head, I would try the following:
- Increase GI vs. AA value from 16 to 32 - I can see that you are dealing with strong noise in glossy reflections and this should help
- How are the long ceiling lights made? Are they Corona Lights, Light Material, or a material using self-illumination? If you would like them to illuminate the scene, use Corona Lights or Light Mtl (they should render the same). If you only want them to glow without actually casting much illumination into the scene, you should use self-illumination. Also check if they are not intersecting with other geometry or shining into the ceiling. That might produce lots of light bouncing around = noise.
- How is you glass made? If it's solid, maybe you could get away with "thin" glass? ("Thin shell (no inside)" option in Corona Physical Mtl)
- Make sure you are using the UHD Cache as the secondary GI solver. Your scene has lots of glossy reflections and light bouncing around so it will help with render times.

Other than that, I can recommend enabling denoising. From your description I wasn't sure if you are using it or not. The Intel AI denoiser has particularly good speed to quality ratio.

wezzex:
Hi Maru,

thanks for the prompt reply,

Im running some tests taking in consideration your insights, and soon I'll be back and can send you the scene.

thanks a lot, take care

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