Could you look at separating walls between the two? What else do you want to put in the bathroom? Probably the best type of tile is a white ceramic tile to blend the floor toilet with the floor. Do users have good vision (not elderly) as if there is a problem of using the floor toilet in the night, you might need a darker tile to delineate the floor toilet

I wouldn't put any water under there because of potential mould issues (in fact, there looks like there's a bit of mould already -- is there?). You could tile the bottom of it and put a strip of LED lights under the glass. What did you have in mind when you initially thought of the idea?

I am assuming you haven't finalised your wall colours and colours of any other fixed elements. In case you have finalised your color scheme you would need to see which of these colours blend well or complement with that scheme. Assuming none of this info is available, then you could look at the neutrals which go with all colours. The white tile and the 2 colours at the end would be preferable. If you want color on the floor as well as drama, you can choose from the 2nd options from both sides or even the 1st from left.

Hello Nitin, Thank you, for some excellent suggestions. I would however like to clarify my requirements/dilemma a bit more. 1) The built/carpet area for this 3 BHK is about 1600 sqft (Superbuilt 1960 sqft). What is the appropriate tile size I need to scout for? More specifically, will Ultima-range-like huge tile sizes (i.e. 120x180cm2, 120x120cm2) be suitable for this area? 2) While I am thinking of white (based) tiles, I am not necessarily looking for super-white tones (it gives a bit of a commercial look, and will need extreme maintenance). Something more practical, and with some depth/dimension is what I am trying to identify. Any suggestions? 3) Would you advice that I consider other white-toned flooring options like Terrazzo (Bharat Floorings is having a Cast-in-Situ option, but I am yet to go to their showroom)? Thanks and Regards.