Shutter

A heavy display typeface drawn entirely in code. Every letter is a fat block, and every counter is a slit no wider than a blade, ending in a pinhole. Light gets in through the cuts, which is the idea.

The whole character set

One blade

All slits are 30 units wide on a 780-unit cap height, so the texture stays even from A to 9. The rule only bends for diagonals.

One pinhole

A slit ends in a dot of 30 units radius, the way an ink trap ends a stroke. It stops the blocks reading as stencils and gives each letter a small bright eye.

Set it large

Below about 28 pixels the slits begin to close. That is a fair price for how it behaves at 300.