Step 2 - Modelling the pool Make a box 8m in length, 3m in width and -1.5m in height. This will ensure that 0 on the Z axis is 'ground'. Set the length segments to 3. Name the object Pool. Apply a Normal modifier, this will flip all the polys to face inward, since it is extremely unlikely we will ever see the pool from underneath the floor. Then, apply an Edit Mesh modifier. Note - In this tutorial, all objects will retain their entire modifier stack. This allows for faster modification in the event of 'Client Changes'. On larger scenes, this slows down 3D Max, but the trade-off is not having to revert to previous versions of the scene to change things.