I've followed josh for quite some time ever since leadwerks, Ultra Engine is the successor of leadwerks and is much better in performance than what leadwerks could ever have or do. Sure there is some missing features but its an in development engine in early access, while yes you don't get the source code you do how ever get great support from josh and the community as well as the fact you never have to worry about royalties,

Ultra Engine is rapidly improving every week with something(in recent a lot of stuff with tessellation, and extra CSG brush features)

There is still plenty of things getting created by the community to try to fill in some of the gaps that Ultra Engine doesn't have and so you should expect some coding with-in this engine. Pro allows C++, or lua while normal is lua only
but since the lua is multi-threaded it will not be a bottle neck unlike leadwerks.(being single threaded)
There is a input/output system a lot like source engine/ hammer or UE3 kismet, Components can have inputs and or outputs to be hooked up by level logic via the flowgraph editor. As time goes on and more components are made, less overall coding will be needed for a faster workflow.

The editor is very much a mix of hammer and unity, you have your main window usually with 4 view at start(this can be changed) and allows the use of CSG brushes for level work rather than having to only rely on mesh only work flow.
on the right side is the scene hierarchy/project files. and on the left you now have a sidepanel like hammer for the various views, flowgraph, asset library, and main scene currently.

This is certainly not production ready yet, but I think its on a really good course.

I've followed josh for quite some time ever since leadwerks, Ultra Engine is the successor of leadwerks and is much better in performance than what leadwerks could ever have or do. Sure there is some missing features but its an in development engine in early access, while yes you don't get the source code you do how ever get great support from josh and the community as well as the fact you never have to worry about royalties, Ultra Engine is rapidly improving every week with something(in recent a lot of stuff with tessellation, and extra CSG brush features) There is still plenty of things getting created by the community to try to fill in some of the gaps that Ultra Engine doesn't have and so you should expect some coding with-in this engine. Pro allows C++, or lua while normal is lua only but since the lua is multi-threaded it will not be a bottle neck unlike leadwerks.(being single threaded) There is a input/output system a lot like source engine/ hammer or UE3 kismet, Components can have inputs and or outputs to be hooked up by level logic via the flowgraph editor. As time goes on and more components are made, less overall coding will be needed for a faster workflow. The editor is very much a mix of hammer and unity, you have your main window usually with 4 view at start(this can be changed) and allows the use of CSG brushes for level work rather than having to only rely on mesh only work flow. on the right side is the scene hierarchy/project files. and on the left you now have a sidepanel like hammer for the various views, flowgraph, asset library, and main scene currently. This is certainly not production ready yet, but I think its on a really good course.