I would recommend seeing if the amount of noise will increase with a shorter render, if yes then you just need a longer render to get rid of the noise!
The corner at the back seems to have a gap in it so I would extend your ground plane slightly to get rid of that. That will also fix the lughting issue on the mesh on the right For me it's also not clear what's happening on the right. I can see there's a wall but then it seems to go to another mesh with nothing above it. Maybe you could try getting a little bit of bloom on the lights on the helmet and increase contrast just a little.
This is a great start, keep it make, make those few improvements and trt again and see how much better it looks!
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I would recommend seeing if the amount of noise will increase with a shorter render, if yes then you just need a longer render to get rid of the noise!
The corner at the back seems to have a gap in it so I would extend your ground plane slightly to get rid of that. That will also fix the lughting issue on the mesh on the right
For me it's also not clear what's happening on the right. I can see there's a wall but then it seems to go to another mesh with nothing above it.
Maybe you could try getting a little bit of bloom on the lights on the helmet and increase contrast just a little.
This is a great start, keep it make, make those few improvements and trt again and see how much better it looks!