SP.PanoramicScreenshot Output is transparent PNG

First time posting here,

I’m working on exporting a stereoscopic panorama from UE4 v 4.13.1 and after some issues with getting C++ Common Tools installed it’s working to some extent, BUT I’m running into an issue where the exported PNGs are transparent, seemingly the engine is taking black data in the file and making it the image mask, meaning darker areas and shadows are transparent. Anyone have a problem similar to this? Everything else is working fine, I started a completely new project and keep having this issue.

Could it be a post-process issue? Or is there a console command I’m missing? I’ve tried setting the SP.ForceAlpha to 1 but it had no effect.