Storyboard 1 - 3D Modeling
This design is motivated by the belief that if Jack sees how the tattoo would look on their body, his expectation would be adjusted in a more realistic direction.
...
Assuming that the interface respond within the perception fusion time, this interface should be quite efficient. Beside the simplicity of the lay out (and hopefully the gesture commands), the interface provide user with a complete design to give them an initial idea of what they can expect. After that, it's the matter of dragging and dropping from the selection panel to get to where they want.
Safety
The interface is quite safe to use, since most clickable elements are large (predesigned tattoo, tattoo components, the display area). Additionally, The user will be allow to reposition the tattoos, and their respective components. Layers of components should be implemented. This feature will allow users to correct any mistake, making the interface safe to use.
On potential issue is lapses, since there are many gestures to be design to give a good control of the preview procedure, there might be a high chance of lapses if those gestures are not well-designed.