Holes that randomly disappear with OSL

[pproestos]

I don't know how to describe it...

I want to have an effect like this:

I mean i want the holes that randomly disappear from the top to the bottom...

I am using Mad's shape OSL shader and a gradient map, but of course

I cannot archive the effect I want...

Any help I appreciate a lot. thx.

**My solution that is...not a solution:

[madsd]

You want to utilize the simple tiles instead, that has ID.
Then let a ramp over v dictate probability to print a hole.

[pproestos]

not being able to do it... 🙂

[madsd · Accepted solution]

One way of doing it.

Update: added 2020 file.

[madsd]

It can be improved to be fail safe from the curve, you need to handle the float values delecatly.
Implementing a step curve will fix this. Also known as posterize.

[madsd]

Like this, open gif full to inspect details.

Change the defaul Catmul rom interpolation to linear for point 0 and 1.

[pproestos]

@Mads... how many THANKS again... Every time I have a shader challenge to do, seems impossible till you answer... 🙂

I will try to understand the mecchanism later on... 🙂