Tiling in a level-floor shower

Lay through as started and just cut diagonally in the corner. Or do you mean the slope?

I would work with two slopes: towards the central joint and the central joint itself with a slope towards the drain. It roughly runs centrally towards it, my eye says. Or is that deceiving?

Yes exactly, I mean the slope. I have to cut the tiles so that I get a slope from the left edge towards the drain, and also from the right side as well. Would it possibly be feasible to mark on some photos how you would cut and lay the tiles?

I don’t quite understand the question. You don’t get a slope in a tiled area by cutting the tiles. That has to be done by the substrate (screed or adhesive). And I would set it up so that:

a) the tiles have a slope from both left AND right towards the middle joint
b) the middle joint itself then has a slope towards the channel
c) the lowest point is where the middle joint meets the channel

I’m not sure if I can draw that. But I can imagine it.

I understand, but if I start from where I am standing in the photos to make the slope towards the middle joint, I am actually deeper in the middle joint than at the edge, or won't this slight edge that forms be that bad?