Well I got some I was thinking on if I did said this or if this is possible for US3 and here are some of ideas. I will putting some "quotes" "Q" for short . on some of my ideas or bring up somebody Else's old ideas.
1. Lighting for gas giants and terrain worlds.
"Q"there is no fun if you don't get Zap by thunder bolt :> ".
2.solar flares and hyper flares.
"Q""Note. hyper flares are mostly found on M-Class stars"
3.Dust and planet formation
"Q"Pretty Damn Fun if I say to see this in Us3 form dust to planets."
4. shadows and hot Jupiter and lava worlds night side glow.
"Q" this again Will be awesome to see!."
5. planet wipe out form supernova.
"Q" I don't need words for this to see where this is going.
6. 3d landscape, 3d clouds