Slope in walk-in shower for exceptional shower design

Good day I am currently facing a problem, namely my new shower which is under construction I have a somewhat unusual shape of the shower My problem is that I do not know exactly how to create the slope The drain should already be in the corner Thank you very much

My problem is that I don't exactly know how to make the gradient The drain should already be in the corner

Why do you think there is a problem? It seems to me that the planner has already solved that, provided a channel in the corner, and the drain then goes downwards in the middle.

He probably finds it practically difficult to create a gradient in more than one dimension. A tiler would probably just model it freehand. As a layperson, I can understand the respect for the task with something like a shower. But that's exactly why I wouldn't do it myself.

Sometimes practical, the gutter must be horizontal. From the right side of the gutter, raise 1-2% (1-2cm per 1m) outward along the wall. From the same point, also raise 1-2% forward to the left. From the left side of the gutter, also raise 1-2% backward. Connect all the raised points from front right clockwise to back left and the surfaces in between will result.

Can you show that in the floor plan? Or is the long wall and one side parallel?

How much deeper is the gutter?

How big are the tiles?