Okay, I did a few more things and this is what it looks like now:
Deleted human reference (the capsule) and the environment is now set up!
Changed color and portal materials too.
There are still a few things to do, but it definitely looks better, doesn't it?
On tomorrow's stream I think we're going to do the wires and maybe touch up the portal textures to have some emissive things? we will see
And of course the “exit” of the effect remains
Edit for the stream ppl: the material was not found so it had to be recreated from scratch another time. Xdddddd