An interesting phenomenon is that if we blend paint with different colors of RGB, it could finally be white. It is reasonable since the paints are totally blended.
But in this slide, we do not physically blend each color, but only rotate the disk to temporally blend them and we still can feel a combined color.
It seems that there is a virtual blender in our brain that integrates all color in a very short period of time.
imjal
@Cehao1 Adding to be clear, blending paint physically is subtractive color whereas combining light reflectances by spinning the wheel is additive color mixing. If you were to blend these paints together, they'd actually absorb almost all the spectra and reflect close to black (but it depends on the proportion of RGB). But if you spin this wheel, you'd actually get grey because the luminance of all the paints combined probably still absorbs more light than the white in the middle.
An interesting phenomenon is that if we blend paint with different colors of RGB, it could finally be white. It is reasonable since the paints are totally blended.
But in this slide, we do not physically blend each color, but only rotate the disk to temporally blend them and we still can feel a combined color.
It seems that there is a virtual blender in our brain that integrates all color in a very short period of time.
@Cehao1 Adding to be clear, blending paint physically is subtractive color whereas combining light reflectances by spinning the wheel is additive color mixing. If you were to blend these paints together, they'd actually absorb almost all the spectra and reflect close to black (but it depends on the proportion of RGB). But if you spin this wheel, you'd actually get grey because the luminance of all the paints combined probably still absorbs more light than the white in the middle.