Looks like classic out-of-gamut color management issue.
Cinema4D like 3dsMax is non colormanaged application. So everything you see inside it, is magnified to your full monitor gamut spectrum because Cinema doesn't communicate to system (Windows or other) that it only displays sRGB colors.
The 'washed-out' look is actually the true color. You can get the same over-saturated look by simply applying wider-gamut profile in Photoshop on top. For example assign AdobeRGB. Just tested it in PS and got your original look.
What monitor do you have ?