Alright so Im new on here and have posted on like 18 different forums so far trying to get help... this one seems to know what they are talking about though

SO
I am building an enclosure for my Chinese Water Dragon ( I have built one before) Its going to be 6ft tall 5ft wide and 2ft deep.
The bottom is going to have a 45 gallon tank in it with about a foot or so of water. (with a heater of course)
I want to build a waterfall for it.... But I need ideas... I have built one for my other water dragon but it was just rocks stacked up in the corner and the water trickles down... I want something a little more sturdy and all one peice...
OH and definately light weight..... easy to work with etc.
I need ideas first of all, I have heard of the insulation sealant foams, the mortar, grout, cement etc.
My basic plan is just styrofoam blocks stacked in the shape, then chicken wire over it to give it structure and frame to work with.
My thoughts are..... what to cover it with?????
What is most natural easy etc.
And I would LOVE to see pics of waterfalls and all other enclosures too. Any animal it doesnt matter. I just would like some creative ideas... or plain ideas.... Thanks a millions....
-Yexi