Please tell me how to accelerate the rendering of diffuse surfaces in the dark scenes. I notice that the render successfully removes noise in the first five minutes of the render, after which it seems that efficiency is inversely proportional to time ...
I use gtx 1080ti, and the scene in the screenshot was rendered in less than an hour. It was an extremely pleasant surprise for me, after two hours in the Cycles did not give even half of the result in half an hour in the LuxCore. Having good lighting and a small amount of diffuse surfaces, there is almost no noise in the scene (only on something gray that I tried to pass off as sugar).
However, it seems that in all renders there is a problem when you try to render something in the dark, in the conditions of lack of photons, a huge amount of almost undetectable noise appears in the scene.
Render in dark scenes
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Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
Re: Render in dark scenes
Nice scene.
What are your render settings right now? Engine, sampler, show some screenshots?
What are your render settings right now? Engine, sampler, show some screenshots?
Re: Render in dark scenes
To cut in half the noise you need 4 times more samples (i.e. rendering time). This is the (sad) mathematical true about noise. So your experience is not uncommon however the development of denosier is exactly intended to help with this kind of problems.S0rda wrote: ↑Wed Feb 13, 2019 7:08 pm Please tell me how to accelerate the rendering of diffuse surfaces in the dark scenes. I notice that the render successfully removes noise in the first five minutes of the render, after which it seems that efficiency is inversely proportional to time ...
I use gtx 1080ti, and the scene in the screenshot was rendered in less than an hour. It was an extremely pleasant surprise for me, after two hours in the Cycles did not give even half of the result in half an hour in the LuxCore. Having good lighting and a small amount of diffuse surfaces, there is almost no noise in the scene (only on something gray that I tried to pass off as sugar).
However, it seems that in all renders there is a problem when you try to render something in the dark, in the conditions of lack of photons, a huge amount of almost undetectable noise appears in the scene.
Have you tried a daily build with Intel Denoiser ?
Re: Render in dark scenes
The dimension of sphere is 27 cm.
The image with the sphere is made in marmosset, the only thing I like about it is a smooth, almost perfect gradient, between the light and dark areas. However, this is where the pluses end, and I still have to wait for the “not real time” render to get the picture more difficult than in this area. Instead of such gradients, I get a huge amount of noise on the transitions from light to dark areas, for which you have to set the render time for ten minutes or more. Perhaps this is just my delusion, but during the fact that the games are more like a movie, on one of the most powerful video cards in the world, getting a noisy sphere in more than 10-20 minutes .... N minutes is strange.
A piece of sphere on the other screenshot is what I get in the luxrader. From a distance it looks "good", but close it is terrible.
If you try to use noise reduction, it does not work very well, much like blur-option in video games, when in the end everything gets blurred or a mix of dark and light pixels is obtained, just in a different order.
The image with the sphere is made in marmosset, the only thing I like about it is a smooth, almost perfect gradient, between the light and dark areas. However, this is where the pluses end, and I still have to wait for the “not real time” render to get the picture more difficult than in this area. Instead of such gradients, I get a huge amount of noise on the transitions from light to dark areas, for which you have to set the render time for ten minutes or more. Perhaps this is just my delusion, but during the fact that the games are more like a movie, on one of the most powerful video cards in the world, getting a noisy sphere in more than 10-20 minutes .... N minutes is strange.
A piece of sphere on the other screenshot is what I get in the luxrader. From a distance it looks "good", but close it is terrible.
If you try to use noise reduction, it does not work very well, much like blur-option in video games, when in the end everything gets blurred or a mix of dark and light pixels is obtained, just in a different order.
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Re: Render in dark scenes
I have not tried the daily build. Correct, unless that denoiser, that in the actual version of the program, not the same, that from intel? I will try, maybe it will work. Please tell me the current settings for it. In particular, how would I remove the noise with the settings that I gave in the screenshots. Because I understand very little in the noise reduction settings in cycles or luxcore. Of course, I understand, there are manuals, but it’s somehow difficult for me to “go deep into the fussing with pixels”, sorry if you consider me lazy.
Re: Render in dark scenes
I tried the values at 10, at 20, 100, but the render time was not reduced, as was the noise level.
In addition, I do not understand why this is bad (or good), I mostly intuitively set values. Well, it seems to be no difference that the diffuse or general limit will be a hundred, because here viewtopic.php?t=508# top it is written that when one of the values reaches the maximum, the calculation stops.
Re: Render in dark scenes
Why should it be reduced ? It ill be increased by 10 times ! You are telling LuxCoreRender to bounce the light 10x more times when going from 10 to 100. In your original scene, you are likely to increase the rendering time by a LOT.
Re: Render in dark scenes
Does not a greater reflection of light produce a lower noise level, so that as many “pixels are lit” as possible?