How can color volume by value with binning several values into single color?

I achived the effect partialy by opening several times the same map. set different thresholds and colors to each one and playing with Per-Model Clipping tool, but it have some drawbacks. Planes can't be at exact same level because I observe artifacts. So I tried to move slightly inner layers upp, but still I observe "staris" effect.

I also tried with Surface color tool, but it uses interpolation and blends colors togather.

In other words I need something like this: https://1.bp.blogspot.com/-5B5ueLHCBPY/T4II4IddvwI/AAAAAAAAB_w/rYwqsJNldY0/s1600/contour1.png

instead of something like this:
https://i.stack.imgur.com/hQmry.png