I'm trying to create a Clipping Mask a la Photoshop in InDesign, but I seem to hit a wall. I was trying to use a bw-png (actual file-gamut is rgb) with some transparency data as clipping mask using the punchout option under "effects".
Turning transparency down to 0% grouping it with the part I want to clip, and turning on Punch out. It Punches out the whole container giving no regards to its contents.
Is there a way to use the b-w image's data to punch out a mask ?