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Both stats looks good. Generally you would want that cache success rate would be at least 50% As for the rays/sample - 40 is perfectly acceptable for interior, it shows that in your scene is no overly complicated materials, too much AO, or too high albedo. Other stats are also looking normal. It could be that your scene is already pretty much well optimized and there's not much you can do, except to render it on faster computer, or use services of render farms.Thank you! I will try that.
If single frame in 4K takes about 4 hours to render, it's only natural to assume that the same frame in full HD will take 1 hour, since it has 4 times less pixels. Upgrading RAM will not help in the slightest if your system is not actually running out of RAM. Corona low memory warning is just that - a warning, it does not necessary means that Corona needs to use swap. If that would be the case, then your render probably would take 40 hours and more and you would see 100% disk usage and pretty low CPU usage.Thank you so much. I learned a lot from your reply. Here's a snip from the stats tab. I can't quite catch what is the limit of low cache or high rays/sample. Can you help me?
As Tom already mentioned, your CPU is not very fast and 4 hours for 4K interior doesn't sound unreasonable. That being said, it's quite possible that your scene can be tweaked further to improve render times. Check the performance stats tab in the VFB, see if you have UHD/4K cache too low, or if rays/sample is excessively high. Maybe your background isn't set right, perhaps window glass blocks too much light, or maybe your albedo is too high. Maybe your materials could be simplified to save some time. Also consider rendering shorter and cleaning remaining noise with denoiser. In summary, do some scene inspection and try to find ways to improve render time - when rendering animation, every saved second counts.
To that quality, at full 4K, on that processor, I'd say an hour per frame is pretty good going :) That said, if you ever get a low RAM warning, then Corona's rendering speed will be severely crippled, so you want to avoid that - less render elements, smaller resolution, are probably the keys here to ensuring things fit within memory.To render in 4k, it takes 4-5 hours. I am rendering the video at 1920*1080p. I will try what you suggested. Thank you so much for helping!
We can't tell if that is expected or not without knowing something about the scene to see how complex it is, at very least a look at the rendered image would help, but it might even take a look at the scene to see if something is set up wrong. That said, it is not that fast a processor (https://corona-renderer.com/benchmark/results/cpu/11700/3 ) too, so longer render times might be expected (my 3960X would be about three times faster, so maybe around 20 minutes per frame, which to me does not sound unreasonable... without seeing the render, at least :) )Here is a video and render of the scene. Yes, I sometimes get a low ram warning. I have been thinking of upgrading the ram to 64. I am just not sure yet if it's worth it. What do you suggest?
Also, are you sure you aren't running out of RAM? How much is Corona using when rendering? No low RAM warning message?
Add unwrap UVW modifier on the model, open UV editor window and take a screenshot like this.Sorry I was offline for a few days because of a family emergency. The distorted map problem was kind of solved. But there is still a problem. You can see in the attachment that the map is inconsistent. The unaltered version of the model had seams in this pattern. Then I applied a uvw mapping clear modifier and converted it to editable poly to create my own seam. But in the end, the texture seems to follow the initial seams. I feel like I am missing some of the steps.
Can you show how unwrapped UVs looks?Sorry I didn’t understand. Please excuse my inexperience.
Proper UV unwrap is in fact superior on models like yours and therefore it should be prioritized over triplanar, but if latter is giving you better results, then why not, you can use it as well :]Yes. It worked better for a particular map. But does not give overall better output. I should try something else with unwrapping. I can't figure out why it looks fine as checker map, but not with the actual.
Did you check if a) your material has triplanar nodes, or b) your textures are set on different mapping channel?I didn’t know about triplanar nodes before. I used here and it definitely gives a better result. Thank you so much!
You can read about albedo in Chaos help portal: https://support.chaos.com/hc/en-us/articles/4528323859601-What-is-Albedo-
Regarding the noise, it is subjective thing and it's up to you to decide what noise level looks acceptable to you. Also it's worth noting that different scenes will show different level of perceivable noise. 3% reported noise level may still look too much in interior with big flat walls, while in exterior with lots of grass and small details, 5% or even 7% may look totally fine.
There's no magic settings. If the scene doesn't have objective issues, then pretty much the only way to significantly reduce render time is to render it on better pc (or render farm), and/or sacrifice the quality - render fewer passes and use denoiser to reduce noise, simplify materials, reduce usage of displacement and bump maps, etc.
In your attached example I would check albedo values - those cabinets and ceiling look very bright.
