mmhhh im sure there would be some floating around the web.... what kind of holes, pattern, and surface.... there can be to many variations

you can edit your material to make the alpha channel of the map you use, transparent. does that give you enough to go on? i can try find the e-mail i received explaining the process for this

unless you are doing product design or drawing a detailed assembly(i.e. small parts, not something large like a building) you definitely do not want to put that many holes in your surface. Faking it with an alpha map will save HUGE amounts of memory. The down side is that this will only show up in the rendering and th "rendered viewport" so you won't be able to snap to it or dimension it.

All you need is a black and white image with the perf pattern you are looking for, then drop that in the "transparent" slot under the object -> materials settings often you can find good perf patterns from manufacturers.

I made the same mistake on my first rhino project, I tried to punch the actual perf patterns though all my surfaces. It took forever to process and and made the model ultimately unusable.

This would be a relatively easy script to write if you know a bit about scripting (or collage snippets of other people's scripts.) Something that extracts U and V isoparms, finds their intersections, makes a circle around a line normal to the surface at each intersection point, extrudes each circle through the surface, and trims. It won't take much memory unless you are making huge areas of perforations.

Try to look at some other people who are writing Rhino VBS - you might find what you need:

Material Systems
theverymany
reconstructivism

Good Luck!

Thanks. I think I will try the alpha map suggested. I have looked into the scripts already and couldn't get them to work. I have to say I am still very green in scripting skills.

i think ur looking at some voronoi noise shader. there are tons of it... the best place is to go to rhino website or related forum for download.