Output-gamma cannot be changed

[CASA_MT]

Hey Corona-team,

as we do not make heavy use of render-elements anymore since using Corona, we did not bother much with making sure that all of them come out completely correct.
As of today we wanted to use the Reflect-element for composing and noticed that its gamma-value was not 2.2 but 1.0 despite having a working 2.2 in the Beatuy-pass.
Afterwards we became sceptical and noticed that only the Beauty-pass had the correct 2.2, all the elements have 1.0. This is just an issue when using the "save"-button of the Common-tab in the render-dialogue.
When saving the files directly from Corona VFB, the Gamma-value will come out correctly.

I tried different things concering the Gamma-value (using values of 4,4 in display, input and output gamma in the max-ini, disableing Gamma completely) but the phenomenom strangely stays the same:
The Beauty-pass has a working 2.2, the elements only 1.0, just like it would not be affected in any way by the modified Gamma in the ini-file.
It is very strange and I wonder if something gets overwritten by Corona internally, so that this happens all the time...


3ds max: 2017
Corona: 1.5

[maru]

Hi,

First make sure that you are using correct gamma settings:
https://coronarenderer.freshdesk.com/support/solutions/articles/5000515647-how-to-configure-gamma-
(including the note about input and output gamma settings at the very bottom)

Sometimes some wrong internal gamma settings are baked into a file. In such case, this should help.

[CASA_MT]

Hi Maru,

I already checked the correct Gamma-settings in the ini-file twice.
What is really strange is, that every modification in the ini-file does not effect the finale .exr-files. They always end up with having a Gamma of 1.0 except for the Beauty-pass, this always has the correct 2.2 (even when I set the output-gamma to e.g. 4.4).
This is also why I asked if Corona overwrites these values internally, as any modification of the ini.file does not seem to work for the final exrs.
This whole issue would be half as bad as it is, if Photoshop could the correct Gamma properly, but of course it cannot do it completely correctly.
As a work-around we currently have to open the exr-files in the Vray VFB, so that we cann add the Gamma there and export the file again.

Has anybody ever tested if altering the Gamma-value within the 3dsmax.ini really has an effect on the images?