Help! Particles not visible in one Map/Level

Hi Everyone!

What could make a particle effect not show up in one level but be fine in another?

I have a Mesh Data particle object that when spawned never shows in one of my maps.
I have tried changing the editor engine scalability settings for Effects.
Distance is already on Epic and I am also checking them up close but still nothing.

What else could it be?


Hmm…it seems to be because the particles spawn inside the bounding box of a much larger convex static mesh. (think, under a bridge)
It a long distance from any actual surface of the bigger mesh. There’s no translucency on the particles or the big mesh.

So some kind of sorting thing?
I already tried changing the ‘Sort Mode’ on the particles ‘Required’ tab. Anything else that could be of use here?