I have a problem rendering png images

[simone_vetro]

hi, i'm trying to render this computer, but every time I render the colors of the keyboard and the screen are exchanged, even though they should both be green.

what can I do?

[lee_griggs]

Does the .png already have an alpha?

[simone_vetro]

yes, there are the screenshots

[lee_griggs]

Maybe it is related to this issue here:

https://answers.arnoldrenderer.com/questions/3174/png-driver-with-alpha.html

"We removed support for this in Arnold 4.1 because the alpha for png files is not in the premultiplied form users probably would have expected. This is because the png standard unfortunately does not use premultiplied alpha. "