I believe that after reversing the gamma for both sides they will be a multiplication away from each other.

So you would need to reverse the gamma for both sides, multiply one of them to make them equal and then apply the gamma correction again.

- alpistinho
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**Posts:**136**Joined:**Thu Jul 05, 2018 11:38 pm**Location:**Rio de Janeiro

I believe that after reversing the gamma for both sides they will be a multiplication away from each other.

So you would need to reverse the gamma for both sides, multiply one of them to make them equal and then apply the gamma correction again.

Thanks for all the feedback

I think I've found a solution. There's a little bit of overlap between the halves so I'm thinking that if I render a few pixels within that overlap without gamma correction I should be able to set up a system of equations. I tried without this extra render but then I got eight equations and eight unknown variables whereas this method should give me only four and, well, I'm lazy

All I need to do is make sure that Auto Brightness is disabled, right?

I think I've found a solution. There's a little bit of overlap between the halves so I'm thinking that if I render a few pixels within that overlap without gamma correction I should be able to set up a system of equations. I tried without this extra render but then I got eight equations and eight unknown variables whereas this method should give me only four and, well, I'm lazy

All I need to do is make sure that Auto Brightness is disabled, right?

- FarbigeWelt
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This is right. I would render a preview, adjusting brightness manually in linear tonemapper during rendering and then stop and restart wirh final resolution.

I am very curious how your rerender will top your already fantastic work.

160.8 | 42.8 (10.7) Gfp / Windows 10 Pro, intel i7 4770K@3.5, 32 GB | AMD R9 290x+R9 390x, 4 GB

17.3 | 19.0 ( 4.7) Gfp / macOS X 13.6, iMac 27'', 2010, intel i7 870@2.93, 24 GB | ATI Radeon HD 5750, 1 GB

#luxcorerender | Gfp = SFFT Gflops

17.3 | 19.0 ( 4.7) Gfp / macOS X 13.6, iMac 27'', 2010, intel i7 870@2.93, 24 GB | ATI Radeon HD 5750, 1 GB

#luxcorerender | Gfp = SFFT Gflops

Okay, I think you've sort of misunderstood my strategy. I don't want to rerender the full scene since I don't feel like waiting another month for my scene be finished. My idea is to figure out the gamma and gain by sampling both halves and a tiny render without gamma correction in order to set up a system of four equations that should give me the factor (gain?) and gamma value.FarbigeWelt wrote: ↑Sat Nov 17, 2018 4:35 pmThis is right. I would render a preview, adjusting brightness manually in linear tonemapper during rendering and then stop and restart wirh final resolution.

Thanks I think I'll top it by having the same gamma on both halves and applying some lens flares and color correction and stuffFarbigeWelt wrote: ↑Sat Nov 17, 2018 4:35 pmI am very curious how your rerender will top your already fantastic work.

Have you tried what alpistinho suggested?

Reverse gamma correction is just gamma correcting with gamma = 1/2.2.

Reverse gamma correction is just gamma correcting with gamma = 1/2.2.

alpistinho wrote: ↑Wed Nov 14, 2018 3:32 pmI believe that after reversing the gamma for both sides they will be a multiplication away from each other.

So you would need to reverse the gamma for both sides, multiply one of them to make them equal and then apply the gamma correction again.

A month!? That's a very long time. Is this usual for some scene types?I don't want to rerender the full scene since I don't feel like waiting another month

That's what I'm trying to do but I need the gamma values and factors. That's what the equations are for.B.Y.O.B. wrote: ↑Sun Nov 18, 2018 3:23 pmHave you tried what alpistinho suggested?

Reverse gamma correction is just gamma correcting with gamma = 1/2.2.alpistinho wrote: ↑Wed Nov 14, 2018 3:32 pmI believe that after reversing the gamma for both sides they will be a multiplication away from each other.

So you would need to reverse the gamma for both sides, multiply one of them to make them equal and then apply the gamma correction again.

I'm assuming Luxcore does gamma correction according to .

Maybe that's where I'm wrong because it still doesn't look good after solving the equations

That is very long indeed. Keep in mind that most of the sunlight has to go through both the fog and the water where it's refracted and dispersed and bounce around inside the pipe. I mean, interiors can be heavy but I think I've created something extreme

I don't know if this sort of render time should be considered acceptable still but that's all I know. Oh, and it's 4K.

Maybe I could have done with a little fewer samples...

Well, it looks great! So if it takes a month, then it takes a month