I created a nebula of particles in Houdini FX and uploaded it to Unreal Engine 5 in Niagara particle system, then a bit of coloring & compositing in Davinci Resolve
Three different nebula created in Houdini FX and uploaded to UE5 🌌
When creating a nebula, it is important to loop the particles simulation so that when they are transferred to Niagara, they continuously appear and disappear.