empty space Empty space around the edges of PyroSim

[ChernykhMaxim]

Hi guys, I had a problem while compositing my project.
For some reason, around my object, on PyroSim there is a transparent strip that does not look beautiful.

If I render each object separately, then I have this empty space (screenshot1 and screenshot3), if smoke + object in one mantra render, then everything is fine (screenshot2). But I need to have them separately for compositing.

 

Here are screenshots of my render settings (object - spacesip and PyroFx - smoke)

 

I would be happy for any of your advice, I see that there are a lot of cool guys here who know the houdini like their 5 fingers

_{Please forgive me for my english}