/diy/ - Do It Yourself

I want to do a multicolor 3D print, but without all the transition tower bullshit.
Couldn't it very easily work this way:
>slice model with areas marked of different colors
>slicer gives you total length of filament needed
>let's say 6 meters
>of these 6 meters the first 2 are of color X, then there's 30 centimeters of color Y, then the rest is color Z
>you manually cut and fuse together the filament by yourself
>start print as usual

Wouldn't this be much simpler? is there such a way to turn your colored model into the separate lengths of filament that it needs?