Tips to make this more like a real island

So I’m using World Machine to create a 560kmx310km Terrain for an MMORPG I’ll be creating. But I was wondering if this looks real enough…not the textures but like the whole Island
I attached the photo to this

Some erosion with high sediment will probably help. I’d also try a blur with it’s placement controlled by the layout device (masks).That’ll get
you some smoother lowlands. For the highlands, do the same thing but using a bias/gain device to make them steeper.
You could also download some real terrain from SRTM and combine it with what you have there, controlling it’s opacity/height with layout masks.

monks