You’ll need to hire someone skilled in 3D visualizations.

I paid a designer to do layouts of my ideas, as she had the software and knew how to use it to its full potential. The accuracy of her diagrams were amazing. 99% of the tile cuts ended up exactly as she drew them out. It also helped I used a GC she recommended who is equally detail oriented!

I’ve done that on an hourly basis, in addition to the overall designs. It is time intensive, and not worth it to most people. A mood board and diagrams is usually sufficient for people to visualize.

I’ve done it the old-fashioned way many times. I narrow down to what I think I’m going to want and then I just lay the tile down on my printer and print out a copy. I do that however many dozens of times I need to, cut off all the little white edges, tape them together, and lay them on the floor, or the shower wall, or whatever surface it is that I’m trying to decide about. For me, it’s a pretty easy and low tech way of creating a mock up. I did this with my kitchen counter choices, and all the tile choices for all four bathrooms that we were we remodeled. You don’t have to cover the whole surface, just enough to get a good visual.

When it came to the actual tile layouts, my tile professional handles that. For some of them he did a dry lay out, but for most of the tiles I had chosen it wasn’t that complicated or difficult to decide on a good layout.

Kevin can do it for you:

https://www.houzz.com/pro/uoflcardfan77/creative-visual-concepts-kevin-strader