I'm currently experiencing the light leaks issue on intersecting objects and thin geometry. I've searched the forums and the general response seems to be 'add a shell modifier'. The most recent post I found was 2017, so I just wondered if there has been a fix for it since then, you know for those times when a shell modifier isn't practical (in my case) and to avoid spending time modelling uneccessary geometry?
I'm working on an apartment interior, the walls, ceilings and door/window openings are one piece of geometry, all created from an extruded spline with flipped normals, so the shell modifier screws that up. I'd rather not have to model the exterior walls each time when they'll never be seen, for a couple of reasons really. Mainly because using Corona has taught me I need to be ultra efficient with scenes so adding geometry that won't be seen seems counterproductive. It'd be nice if it just didn't happen because I can't see any reason why it shouldn't just work in theory, but I'm far from technical. I don't know if it's technically possible for it not to happen i.e. it can't be fixed