Be some lasers that are.

• just the right wavelengths
• just the right power
• just the right PWM (?)
• just the right diameter
• <your-fav-thing-here>

Controlled precisely by servos and microcontrollers and whatever. And software.

You are as naked as you are willing to be.

The lasers paint patterns on your skin, combining the types of lasers arbitrarily. Think of it as "really high dpi", as precise as your imaginary lab will allow. Maybe fancy, fancy expensive television/monitor grade resolution. 16k ....whatever it takes.

It would be nice to include the idea of a "cooling" laser. It just cools somehow. Included as a theoretical tool if that is as impossible as it sounds.

In any case, cooling needs to be addressed somehow because io ~ heat, I'm pretty sure. You "ow this hurts" quickly overwhelms everything else. Channel is full of noise.