I am trying to draw a wall with street light above it.
The light is the triangle with 4 corners. I'm trying to clip mask the bricks and triangle but the bricks don't show. They are there when I hover over the triangle but are not visible.
You just need to put 2nd triangle layer on top bricks group.
Follow this pattern. It will help you.
1) Take triangle shape.
2) Paste your bricks above it. make all in 1 group.
3) Take triangle shape again.this is mask layer.
4) Select 2nd triangle shape and group of bricks.
5) Right click select "make clipping mask".