Anti slip surface

[wim (Wim Dekeyser)]

Some solutions are posted in this thread:

Array on surface (or similar), where can I learn how to do this?

I’d like to be able to make like regular, raised (or indented) dots on a surface/solid. Like for example touching points where someone would grip onto something. Or even one-dimensional grooves. Even better would be a hexagonal grid but I suspect that’s much more difficult. Does Rhino have some basic commands for this? Or do I need to learn panelling tools? Or do I need to make up a grasshopper definition? What’s the best way to go about this / where can I watch some video tutorials to learn h…