Very nice @Alex_Khmil
Recently I discovered GhGL. It looks very promising and interesting. Thanks for everyones work. 
Right now, I am using Dendro/OpenVDB a lot for complex geometries. Dendro works well. However, the Dendro plugin visualizes SDFs and points clouds by first creating a mesh and then using the mesh to visualize the result in the Rhino viewport.
I think it could be faster to use GhGL to visualize these point clouds and SDFs using ray casting (instead of first generating a mesh and visualizing as a mesh in the viewport). Your example looks quite nice, Alex.
@ryein, the developer of Dendro, also talked about this approach in the following thread:
“… I had read the GHGL documentation when it came out, looked over some of the examples, and felt I had a workable solution. For whatever reason I just couldn’t get the volume to render and ended up just coding it with the mesh rendering after getting frustrated.”
Any thoughts on this? I checked some examples of GhGL but was not able to find examples with SDFs. Has somebody worked on this approach?