I thought I would share this particular studio photo because it shows the evolution of an improvised mosaic design, in this case a sailing ship.
It also showed ad hoc changes to the pattern after it was already taped beneath clear contact paper.
A mosaic is not a drawing, and we call rendering an existing image into a new medium “an interpretation” even when executed by the same artist because different artistic mediums have different languages.
You can create a mosaic pattern by placing tracing paper over an existing image and merely tracing it, but there is still a lot of artistic decisions to be made.
When you start laying tile, you may find that your design has to change is some way and that the pattern was just a starting point.