In the latest update of JBShady's T4M-Enhanced a lot of new improvements were added, one of them being a console command to enable the gamma levels from the xbox 360 version with r_gamma_x360 1, honestly this makes the game look a lot better, the pc's version colors always looked washed out but this fixes that. You can find a screenshot comparison of der riese in the github release page.
I'd love to see this make its way to Plutonium.