Sorry, lost my link... Need to find IRAY settings again...

Malandar

Yeah here I am asking for help again... sorry

Okay, basically I have been on a render spree here for the past several weeks and I have got more renders done in the past two weeks than I have done in a year I think. I had settings set that I liked that allowed me to get a 4k render done in about two hours with 0 noise... and then I accidentally hit the default settings button and now ALL of my saved scenes are set to default settings for some reason NONE of them retain the settings I had used so now my renders have fireflies and noise galore at the  render settings I can remember using, so I know I am missing at least one setting that is causing them, but I  don't remember what they all were because I never changed them and now I can't find the thread here that had the  list of settings I used and I have just spent about three hours looking for them using the forum search...

Can  you guys please help me out with some settings that result in clear sharp noiseles renders in a couple of hours?

Vid card is a GTX 2060 Super with 8 gigs if that helps any.

margrave

The amount of noise in a render is far more impacted by the lighting you have in your scene. To reduce noise, it's better to add ambient light and bring the light level up to a point where Iray is receiving enough color data.

But these are the following settings I know will help with reducing noise/render time:

---

Caustic Sampler: Turn this on if you have glass, water, or anything that uses refraction.

Instance Optimization: Select "Memory" to enable instancing, drastically reducing the memory usage if you have instanced objects.

Firefly Filter: Enable this to reduce noise.

Post Denoiser: Used to remove noise from the final render. I never use it because it makes everything look like a plasticy watercolor painting.

Pixel Filter: An algorithm used to blur pixels together and sharpen/smooth out the image. People recommend "Mitchell" at 1.0 as the best option.

Spectral Rendering: "Natural" will greatly expand the spectrum of your lighting, resulting in better light and shadows and less noise when you have highly concentrated lights. Like going from a 16-bit PNG to a 32-bit PNG; it allows more space for finer gradiants. You may have to crank some lights up to crazy amounts (like 100,000,000) to fill the larger spectrum. Also known to introduce ugly UV seams on some skin textures.

Malandar

margrave said:

The amount of noise in a render is far more impacted by the lighting you have in your scene. To reduce noise, it's better to add ambient light and bring the light level up to a point where Iray is receiving enough color data.

But these are the following settings I know will help with reducing noise/render time:

---

Caustic Sampler: Turn this on if you have glass, water, or anything that uses refraction.

Instance Optimization: Select "Memory" to enable instancing, drastically reducing the memory usage if you have instanced objects.

Firefly Filter: Enable this to reduce noise.

Post Denoiser: Used to remove noise from the final render. I never use it because it makes everything look like a plasticy watercolor painting.

Pixel Filter: An algorithm used to blur pixels together and sharpen/smooth out the image. People recommend "Mitchell" at 1.0 as the best option.

Spectral Rendering: "Natural" will greatly expand the spectrum of your lighting, resulting in better light and shadows and less noise when you have highly concentrated lights. Like going from a 16-bit PNG to a 32-bit PNG; it allows more space for finer gradiants. You may have to crank some lights up to crazy amounts (like 100,000,000) to fill the larger spectrum. Also known to introduce ugly UV seams on some skin textures.

 

 

Thanks, this isn't all the settings I was using, but it is some of them. I just wish I could find the thread i has got the original settings from. But at this point I don't even remember what the thread was about.

margrave

If your renders are suddenly exploding with noise just because your render settings changed, you were probably either using the denoiser or natural spectral rendering.

If it was the denoiser, I'd recommend against using it.

Instead, just add point lights with the light geometry set to "Sphere" and the size set to 50cm to 100cm throughout the environment. It looks much nicer than the horrible plastic puke the denoiser vomits out.

Malandar

margrave said:

If your renders are suddenly exploding with noise just because your render settings changed, you were probably either using the denoiser or natural spectral rendering.

If it was the denoiser, I'd recommend against using it.

Instead, just add point lights with the light geometry set to "Sphere" and the size set to 50cm to 100cm throughout the environment. It looks much nicer than the horrible plastic puke the denoiser vomits out.

Well I have rendered a picture with  noise reduction on and off and I have noticed a few things from what I have seen there is not a lot of difference between on and off that I can tell, and off it takes WAY longer. I set the blur radius way low so maybe that has something to do with it, but I don't know.