How to get transparency to cast shadows.

Hi,
Yes sum1 answered in the details>rendering>render pass there are boxes to untick

soooo, part 1 of a 2 part problem is solved.

Just need a shadow on opacity zero? or transparent.

Only been on unreal a week. Ive come from a movie/animation background. All these talks of blueprints.c++ and nodes is a bit overwhelming…

Thanks for the reply