This is a strange part of a Pool, but only to show where these parts could be placed.

The same tiles named "With Depth" are used in the same way.

To find the view of the tile that matches the part of the pool you want to use, rotate the object in your game till you see the similar shape.

Basic border and corner tiles - Without Pool Depth
Object's Name: Border corner W2 no depth
NW	NE	SE	SW	Rotations
Objects Name: Corner 4 W2 no depth
NW	NE	SE	SW	Rotations

Example of pool with the above pool tiles, without depth. Move your mouse over the pool to see wich file and rotation is used.