Oh yes, moment, I'll ask Veronika where it is, and upload them when I find them on disk.
This thread has been very useful for me in pushing the limits of Corona to see what it can do.
From researching the advice of Juraj, Rawalanche and The Keymaster, and rendering the same 800MB scene
over and over again, I have deduced the following:
1. Pushing the Record Quality from 256 to 2048 helps with creating more quality, though only for interiors.
1024 is sufficient for exterior scenes. Anything more than this is a waste.
2. Have no idea if increasing Max records from 100 to 999 has any benefits as Maru suggests. I am intrigued if anyone knows better?
3. Rawalanche's advice to change Image Filter in (Tent) to 1.333 instead of 1.5, for sharper images, creates more fireflies.
Keymasters advice that filer is not necessary actually works. I prefer not to use filter as a result.
It is advised on the net (and using Vray) to only use filters for animation, not stills.
4. MSI produces small fireflies past 100. I would prefer to go to 200 or even 400 as Juraj suggests to achieve unbiased results.
But, 100 seems to be the limit for me. Having 0.0 MSI produces a firefly plague.
5. Pixel density is very important. The bigger the image, the better, as Juraj advices. 1920 x 1080 produces flat, blurry results.
You have to go to 4K to start to see improvements. Juraj says he has frame buffer problems going to 8k. I don't have any problems
going to 8k but it takes 1 hour per pass, so after 5 hours and only 5 passes, I decided to ditch the potential of 8k and stick to 4k.
6. HDRi alone are not good enough for me. Even using CG Source. I find I have to support it with Corona Sun at very small 0.003
settings to add warmth to the renders and flush the shadows more. I also increase sun size to 5.0 to diffuse the shadows.
7. PT + PT does not work for me. It creates extra noise and fireflies. PT + HD has best results for interiors.
8. Corona materials perform better than standard mats. For example, I noticed bump maps give more convincing results so you can
avoid using displacement.
9. From using PP software, Alienskin Exposure7 works better than Photolooks and ArionFX. There sharpening filters perform better as do there
colour filters, though this, I guess, is personal taste, but since most pro photographers use Exposure, this is a good sign.
All done on a 2012 iMac, i7, 12gb ram, 1gb Graphics card.