Preserve Color switch does not work - CPU switch does not work

[s4magier]

• Ticking the "Preserve Color" switch will just lead to noise output, running the application without Preserve Color works normally.

• The "CPU" switch does not work as my GPU could not be found. Changing os.environ["CUDA_VISIBLE_DEVICES"] = "-1" to os.environ["CUDA_VISIBLE_DEVICES"] = "0" makes the CPU switch work for me.