Re: Large difference in brightness between luxcore 2.2 and 2.3beta1
Posted: Sat Feb 01, 2020 6:48 am
I found the "problem", you need to enable Normalize on your Blackbody. This is weird because to match 2.2 behavior, Normalize should be off...
What I also noticed is that Emission nodes were probably always normalized by color luminance in 2.2. So if you want to match the exact same brightness, you will have to check that box in 2.3.
I think that this should stay off by default for the Power unit and I wouldn't recommend changing its defaut to match 2.2 behavior, to unify the workflow between lights and emission nodes.
EDIT: The two normalize are fighting a bit against each other. Normalizing by color luminance in the Emission node will in fact change the range of the Blackbody to 0-1, but it will also apply a luminous efficiency curve that will normalize based on the color.
The Normalize in the Blackbody Temperature will only change its range to 0-1.
What I also noticed is that Emission nodes were probably always normalized by color luminance in 2.2. So if you want to match the exact same brightness, you will have to check that box in 2.3.
I think that this should stay off by default for the Power unit and I wouldn't recommend changing its defaut to match 2.2 behavior, to unify the workflow between lights and emission nodes.
EDIT: The two normalize are fighting a bit against each other. Normalizing by color luminance in the Emission node will in fact change the range of the Blackbody to 0-1, but it will also apply a luminous efficiency curve that will normalize based on the color.
The Normalize in the Blackbody Temperature will only change its range to 0-1.