How to stop Light Functions from projecting through meshes?

Development Rendering
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1

I’ve created a custom Light Function for water caustics in my game, but the light function is projecting through the walls and floors of my map. The geometry is solid (not built with planes) and I’m not using any static lighting (it’s disabled in my project settings). Is there any way to block light function projections?

1920×1080 528 KB

Thanks!

2

turn off shadow casting

3

Really!? Why would shadow casting go through walls and floors though? I’ll try it and let you know.

4

Did you get a resolution to this?
I’m having the same issue - disabling Cast Shadows didn’t help.
(using v5.4)