Maxwell Render | Official public forum

Since after so long a time I'm finally starting to use Maxwell (and enjoying it very much), I get the impression there may not necessarily be a constant exact correlation between SL attained and amount or clarity of noise (in other words, for instance an SL 20 may not bring every image to the same clearing of noise). Is that right?

I had always assumed I had to reach SL 25 or close to (I've not gotten close any time so far), but have had some test images that could be cleaned up enough with Neatimage with SL's under 20.

you are right. interiors scenes with tons of emitters may reach SL=21 and still have some glass noise yet the same scene without emitters will be clear at SL=16.

Acceptable noise clearance times are also influenced by materials within the scene - generally I've found if a scene isn't clearing of noise at sample level 18 then the time going to SL 25 will have little positive impact.

I also see a difference in SL, resolution and noise.

The higher resolution images I render seem to be cleaner at lower resolution than my lower res images- although it takes them longer to get there !

When I am rendering a higher res scene I will often stop my render at SL 17 and have a very clear image. Whereas in a lower res scene I will let it render to SL 19 or higher.

I would be interested in knowing a bit more about how SL is reached and its influences.

choo-chee wrote:you are right. interiors scenes with tons of emitters may reach SL=21 and still have some glass noise yet the same scene without emitters will be clear at SL=16.

I did a basic test comparing a scene with 1 emitter and then one with 100 emitters and the time to reach SL10 was about the same, although now I will have to compare the noise level of each as that is what really matters at the end of the day.

Becco_UK wrote:Acceptable noise clearance times are also influenced by materials within the scene - generally I've found if a scene isn't clearing of noise at sample level 18 then the time going to SL 25 will have little positive impact.

I have been suspecting that as well that the materials have a significant impact on the image noise....will have to look at that. Interesting comment about SL25 not improving the situation much.

caryjames wrote:The higher resolution images I render seem to be cleaner at lower resolution than my lower res images- although it takes them longer to get there !

Cary....can you take another stab at that statement?

caryjames wrote:When I am rendering a higher res scene I will often stop my render at SL 17 and have a very clear image. Whereas in a lower res scene I will let it render to SL 19 or higher.

When you refer to a "higher res scene", I take it you're referring to a larger (more pixels) image? So which is quicker?

caryjames wrote:I would be interested in knowing a bit more about how SL is reached and its influences.

Me too

caryjames wrote:
The higher resolution images I render seem to be cleaner at lower resolution than my lower res images- although it takes them longer to get there !


Confused Confused Confused Cary....can you take another stab at that statement?

You didn't get that one Josephus !



I meant to say the the higher res images are cleaner at a lower SL than my lower res images at higher SL

Hope that is a little clearer than mud... have to remember to preview my posts !![/quote]

also take in consideration on interior scene at the "white" color.
255 / 255 / 255 takes consideralbe time to clear, when something like 220 /220 /220 is way faster... i think its jomaga that did a topic on that subject a few years back with tests to prove it ( not sure optimized white is 220 but its in his article ( no time to search sorry)
N

messire wrote:also take in consideration on interior scene at the "white" color.
255 / 255 / 255 takes consideralbe time to clear, when something like 220 /220 /220 is way faster... i think its jomaga that did a topic on that subject a few years back with tests to prove it ( not sure optimized white is 220 but its in his article ( no time to search sorry)
N

Thx for the tip...I found the post. I do have a white that is too high according to this. Seems like Mike Verta's recommendations for white RGB values were higher..which is what I went by.

Will run another render with lower white RGB settings and see if there is a noticeable difference.