Roughness UE4 0-1, Photoshop 0-100?
polycounter lvl 10
Hi everyone,
I recently started playing around with UE4.
The new roughness map is amazing but I am a little confused about how the luminance values from Photoshop correlate to the 0-1 nature of roughness in UE4.
Plugging a constant with 0.35 value into roughness gave me a good result but I wanted some variation so I made a roughness map with values around the 35 range in luminance in CS6.
The results wheren't similar until I bumped the PS values to the 60s range.
Is there an easy way to calculate/correlate the two?
Is there any documentation from Epic on the subject?
Any help would be appreciated.
Cheers
I recently started playing around with UE4.
The new roughness map is amazing but I am a little confused about how the luminance values from Photoshop correlate to the 0-1 nature of roughness in UE4.
Plugging a constant with 0.35 value into roughness gave me a good result but I wanted some variation so I made a roughness map with values around the 35 range in luminance in CS6.
The results wheren't similar until I bumped the PS values to the 60s range.
Is there an easy way to calculate/correlate the two?
Is there any documentation from Epic on the subject?
Any help would be appreciated.
Cheers
Replies
I've been looking into things but the more I look the more I get confused.
Is there a way of calculating this?
I found lots of ways or assigning and reassigning color profiles in photoshop but that just has me 'fixing' a problem without really knowing how I'm fixing it.
I would like a simple table or formula to be able to ballpark the values in my head.
You can change it with levels, like this.
To Linear Space
To sRGB Space
Gamma of 2.2, so sRGB is ( 1 / 2.2 ) = approx 0.45454545.....
the slider is 0-1
.35 on the slider is not the same as (35,35,35)
255*0.35 = 89.25
Thank you Drew++ and Chronic