Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] I need help! => Topic started by: mferster on 2016-03-24, 17:12:52

Title: Best Practices? Lowering Albedo or darkening bitmap?
Post by: mferster on 2016-03-24, 17:12:52

Let's say a texture in your scene is coming off as too bright. I'm just curious what is the better practice, lowering the albedo value, darkening the bitmap directly, or using adjustments either through color correction/outputs?

Are there any differences between these methods; such as in rendering performance or how they interact with light sources. Or are they ostensibly the same thing?

I'm curious how other people tackle this scenario.

Cheers,

Title: Re: Best Practices? Lowering Albedo or darkening bitmap?
Post by: maru on 2016-03-24, 17:43:16

Lowering diffuse level is exactly the same thing as darkening your bitmap in PS or altering output settings in 3ds. (there should be no performance/visual difference)
Using 3dsmax color correction node always makes rendering slower.

Title: Re: Best Practices? Lowering Albedo or darkening bitmap?
Post by: Nekrobul on 2016-03-25, 14:22:50

Quote from: maru on 2016-03-24, 17:43:16

Lowering diffuse level is exactly the same thing as darkening your bitmap in PS or altering output settings in 3ds. (there should be no performance/visual difference)
Using 3dsmax color correction node always makes rendering slower.

Maru are there some tests\numbers to compare? I am actualy using a lot of Color correction stacs in my scenes and if this is true and afects rendertime dramaticly i might review my pipeline.

Title: Re: Best Practices? Lowering Albedo or darkening bitmap?
Post by: Ondra on 2016-03-27, 00:41:54

pre-max2014 it was a LOT. Then they fixed it.

Title: Re: Best Practices? Lowering Albedo or darkening bitmap?
Post by: iLEZ on 2016-03-29, 10:30:26

Quote from: maru on 2016-03-24, 17:43:16

Using 3dsmax color correction node always makes rendering slower.

Just to be clear, the output node is still fine to use, right? So you could "clamp" the bitmaps with that without messing with the render time significantly?

Title: Re: Best Practices? Lowering Albedo or darkening bitmap?
Post by: maru on 2016-03-30, 16:54:00

According to this simple test it looks like there is almost no difference between the bitmap alone and in the output node (there is 1s difference, but it is neglible), and cc makes it a bit slower (few seconds here, could be significant in a more complex scene/longer rendering).

Title: Re: Best Practices? Lowering Albedo or darkening bitmap?
Post by: PROH on 2016-03-30, 19:30:32

Got the same result in my tests. "Output" is the same or very little slower as none, but "Color Correct" is 10 - 20% slower than none.