Search found 89 matches

by chafouin
Sun Apr 05, 2020 4:48 am
Forum: Works in Progress
Topic: Beach Resort - LuxCoreRender 2.4
Replies: 2
Views: 408

Re: Beach Resort - LuxCoreRender 2.4

Looks promising!

Any specific reason you are using Metropolis?
by chafouin
Wed Apr 01, 2020 6:18 pm
Forum: User Support
Topic: Brightness difference between Viewport and Render
Replies: 6
Views: 321

Re: Brightness difference between Viewport and Render

Dade wrote:
Tue Mar 31, 2020 3:19 pm
I should have fixed this problem.
Thanks Dade!
by chafouin
Tue Mar 31, 2020 3:21 am
Forum: User Support
Topic: Brightness difference between Viewport and Render
Replies: 6
Views: 321

Re: Brightness difference between Viewport and Render

CPU and OpenCL, I tried both.
by chafouin
Sun Mar 29, 2020 10:44 pm
Forum: User Support
Topic: Brightness difference between Viewport and Render
Replies: 6
Views: 321

Brightness difference between Viewport and Render

Hi there,

I'm noticing a difference between the viewport and the final render.
blender_sF5BID4orQ.png
I am not using clamping, there is nothing done in Compositing, so I'm not sure why it looks like it's clamping or applying a different tonemap.\
I attached the scene.
by chafouin
Sun Mar 15, 2020 12:43 am
Forum: User Support
Topic: Clamping Max Brightness
Replies: 2
Views: 252

Re: Clamping Max Brightness

I can't talk about the Clamping as I am not sure how it works. About your light brightness, you need to not forget about the inverse square law, that makes the brightness decay with distance. The brightness is also divided by Pi because we assume the emission is calculated per steradian (this is onl...
by chafouin
Fri Mar 06, 2020 4:18 pm
Forum: User Support
Topic: Light intensities and matching Cycles
Replies: 83
Views: 8050

Re: Light intensities and matching Cycles

What are exactly your settings ? Sensitivity, exposure, fstop ? F/1.0, Shutter speed 1s, ISO 100 which corresponds to EV100 0. If it helps, 2.5 lux results in "proper" exposure for EV0. Meaning, I guess, middle gray is middle gray? Maybe this is the confusion here? When we say EV 0 corresponds to a...
by chafouin
Fri Mar 06, 2020 5:31 am
Forum: User Support
Topic: Light intensities and matching Cycles
Replies: 83
Views: 8050

Re: Light intensities and matching Cycles

@Dade, can you please check the Camera exposure math to see if everything is correct? In Unreal, here is a 1 candela point light placed 1 meter above a white floor: UE4Editor_yK6hXgKXuT.png As you can see it reads 1 lux, everything is exposed with a manual EV of 0. This is in 4.25 without using the ...
by chafouin
Thu Mar 05, 2020 6:47 am
Forum: User Support
Topic: Light intensities and matching Cycles
Replies: 83
Views: 8050

Re: Light intensities and matching Cycles

I wanted to make sure there was no wrong information staying on the forum as I wrote some confusing things yesterday. If LuxCore tonemapping is off, the output is luminance (cd/m2) and can be saved as EXR and HDR format. With the next version of Photographer (3.x), you will be able to visualize came...
by chafouin
Wed Mar 04, 2020 9:06 am
Forum: User Support
Topic: Light intensities and matching Cycles
Replies: 83
Views: 8050

Re: Light intensities and matching Cycles

Is there an option somewhere in the tons of Blender menus that allows me to read those raw values? I really don't see an option there to read the numbers. In the render settings, under Color management: blender_tPGsEy9BiV.png Then disable LuxCore tonemapper in the camera: blender_2aPO9n4hoK.png In ...
by chafouin
Wed Mar 04, 2020 7:18 am
Forum: User Support
Topic: Light intensities and matching Cycles
Replies: 83
Views: 8050

Re: Light intensities and matching Cycles

Found what the 1.2 is: // Compute the maximum luminance possible with H_sbs sensitivity // maxLum = 78 / ( S * q ) * N^2 / t // = 78 / ( S * q ) * 2^ EV_100 // = 78 / (100 * 0.65) * 2^ EV_100 // = 1.2 * 2^ EV So they are actually doing the same. However... reading the 20 pages of that thread, it loo...