At this part of the website you are able to find tips to make Prepar3D v4 look better.
I use REX skyforce 3D for my clouds and skytextures, Active sky for weatherengine. Chaseplane for the custom camera views. UTlive for my offline AI traffic, BVAI traffic for my online model matching on vatsim. I no longer use the regular PTA by simtweaks i now use Tomatoshade PTA beause it has more features. To finish it all of , Reshade with a custom preset. so to sum it all up i use the following main add ons:
REX Skyforce 3D for clouds & sky Active sky for weatherengine
chaseplane for custom views
UTlive for offline traffic
Smart Sim Design 3D Night Lights in combination with FTX global lights