Flooring Tile - Shower base

I am building a new bathroom on the second floor over the garage. The shower is an odd shape, so I could not buy a pre made base. I had never made a shower base before, so I had someone put in the rubber and pour and slope the base over that to be ready for tile. I am ready to tile and noticed that the base is not perfectly flat. It looks like one of my kids went in there before it was dry and left a foot print. My question is can I tile over that and use the thin set to make up for the diffrences in height? Do I use a leveling material and then tile over that? Or do I have to break it up and repour?

If it is as big as an elephant would make, then I would relevel it. If a child just stepped in it, most likely your thinset will make up the difference. Of course releveling is ok to do. Just make sure the edges of the footprint didn't poke up too high , as he had to displace the leveling compound to somewhere, and the edges would be it.

You should grind down any high spots and fill in any low spots with thinset prior to setting the tile. I assume you will be using some sort of 12" x 12" mossaic sheets. Larger tiles will not conform to the slope of the mud bed. You'll want to get all the highs and lows corrected prior to setting the tile. If not, all those high and low spots will show through in your final product. You may wind up with puddling.:)

Do you have a preslope under the pan liner? This is required so that water seeping through the mud bed will make its way to the weep holes in the drain. :)