andolaurina,  the amount of render time is going to be much slower with IDL, that's a poser thing, not a product thing.  In all actuality, this was not built with IDL in mind, in fact I think that they recommended to not use IDL but to use the lights that come with it as a start and go from there. 

It reminds me a lot of Bryce, you would load a sky and the correct lighting would come with it, I LOVE that, about this.  

I would suggest any wishes you have for expansions that you take them over to RDNA and start a thread :)

That way at least the creators will see them :) 

I do know that there will be plenty of expansions coming, I'd get my wishes in soon :) They have pretty big plans for this, the actual getting the base product out was just the beginning :)

The render looks really good :)