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Blending colours has some restrictions, introduced by Cinema 4D and the today's render engines:
- All render engines use an additive RGB model. This means that mixing red, green, and blue in equal proportions, results in pure white.
- The mixing of subtractive colours (CMYK), on the other hand, results in pure black or – more or less dark – grey tones. This colour model is not supported by today's render engines.
- These fundamental differences between the colour models (RGB vs. CMYK) may result in apparently wrong colours, but in fact they are correct according to the additive RGB model.
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