Thanks for the suggestions. I am using Home Designer Pro 2016.
Wedges and ramps will work, but a more accurate depiction would be an upside down pyramid where I could adjust the peak (where the drain is). I see the pyramid shapes, but doesn't seem like I can flip them over.
Ideally it would be nice to specify elevation points/splines like in the terrain features- is it possible to have a terrain perimeter inside the room itself?
It does't have to be a perfect representation, but we have ceiling heights that are within inches of the required code in various spots and this will help with design possibilities to have a decent representation of the slope on the floor.
Thanks!