1. Nighttime drawing only affects pixels with alpha channel on the dialog window.
The nighttime effect should be unnecessary on the dialog window.
I mean, on the dialog window, pixels that are not transparent will not get dark but only pixels with alpha channels will get dark in the night.
This occurs with both standard and extended.
(Currently there are few pak files with transparent pixels but I think that this will increase in the future mainly rendered by 3D modeling.)
2. Alpha channel reversal phenomenon on the dialog window.
The black contamination rate during this night is inversely proportional to the transmittance.
(I suppose this may be other than the grayscale color.)
Roughly speaking, 99% black is mixed in pixel with a transmittance of 1%, and 1% black is mixed in pixel with a transmittance of 99%.
This seems to distinguish between 0 and null (when makeobj creates a pak file), if it is perceived as transmittance 0%, the pixel may become completely black at night.
The result of replacing the icon with an image with an alpha channel in pak192.comic.



It is the same in every dialog window, such as line managemant screen and convoi list, not only in depot.