Fixed it. The Ray Depth Limit was set to 1 so I dropped that down to 0 and it is now smooth and perfect ^^

Thanks for your reply. I've tried adjusting the settings and its not made any difference. I was using an ambient light, but I tried changing it to directional and it mostly fixed it. the shadow is...

My first post here. Been trying to set up my shadows for a project. Problem is as you can see in this picture, the shadows are jagged and just going over the polygons. I dont know why its doing...