Hi
I make static images in Blender for printing.
In the context of Real Time rendering:
Would there be any advantage in exchanging EEVEE GI for Unreal: Lumen?
Especially in terms of fluidity during work?
Thanks
I would argue not really, especially with EEVEE having added raytracing support giving it a big bump in realism.
While lumen might render a little bit faster (but it would probably depend on the scene you where trying to render), you would lose that time gain in having to export your project to unreal (and maybe back if you want to post-process the image).
As for how fluid your workflow is, EEVEE is just a drop-down with some options, lumen would require firing up an entire program most of which you aren’t going to use (game logic, sound, UI tools, etc.)
Are there addons that provide tools and improvements for EEVEE GI?
Probably, but it depends on what you need. Have a look at what google reccomends or what is on the extensions platform.
If you need speed, you might want to also check out the Workbench render engine (what blender uses to render the unshaded viewport) or enabling fast GI approximation.
If you need realism, consider enabling EEVEE raytracing or just switching over to Cycles.