Holes in a wall

[Krisztian Gulyas]

How to create many triangular holes in a big wall?

I want to create something like this, but more random (different sizes, different rotation, bigger on left side, smaller and smaller toward the right side).

I thought creating a black and white image in PS and use it as a refraction map, or using proBoolean, but it would take a lot of time. Is there an faster method?

[erkutacar]

uve got the correct idea with a texture map but dont use refraction map, use it as cutout map. if u try to model this, it will be very messy.