Click the grid to add or remove tiles. Click a cubie to cycle split tiles. The info box shows tile column, row and split number.
Random draws an array of random tiles.
Solid redraws split tiles as solid ('split0').
Export writes the grid data as text, where it can be copied and saved to a text file.
Import draws the grid from file data in the text box.
I've added 17 data files (click twice to import) and some backgrounds.
File data defines lower 'Y' (point away) tiles only, weighted c/w 1, 2, 4.
The upper tiles are then calculated to correctly complete the layout.
There are 64 tiles (see file 00), with 25 possible split tiles, shown with a trailing '-' or '+' symbol in the file data.