distressed objects - need transparent distressing not just same background color.

I tried looking for this answer, I'm sure it's out there, but couldn't find it.  I'm wanting to distress an object so it can be printed on a wide variety of colored t-shirts and I'd like the actual color of the t-shirt to come through the distressed sections - thus these distressed sections need to be transparent and not just a background color the same as the shirt.  Does anyone know how to do this in CorelDraw 2017?  Thanks