Customizable LEGO-Compatible Brick

This parametric brick takes the popular work of http://www.thingiverse.com/thing:5699 (now unavailable) a couple steps further, adding easy Customizer support and support for generating wings, smooth-topped tiles, DUPLO-style bricks, sloped bricks, Technic-style holes, and more.

Depending on the resolution of your printer, you may not be able to print pieces that fit exactly with standard LEGO blocks. If you do print any of these bricks, I'd be interested to know whether they fits together with other bricks, especially if you have an SLS or SLA printer.

These blocks are not strictly identical to LEGO bricks, but they should be compatible in most every way.

For Technic-compatible axles, see https://www.thingiverse.com/thing:6922851

2026/01/04: Updated with native scaling support so that scaled-up bricks still interlock properly with each other.

2024/06/25: Updated with support for bricks without posts underneath.

2023/01/08: Updated with support for 1.5x tall bricks.

2022/01/30: Updated with support for inverted roadways, that is a brick that only has studs on the roadway.

2021/12/09: Updated with support for rounded studs, closed block bottoms, and optional wall splines.

2016/02/14: Updated with support for double-female-sided bricks: no studs on top or bottom.

2015/01/12: Updated with support for double-sided bricks: studs on the top and bottom.

2015/01/11: Updated with support for baseplates, roadways, and better error detection.

2015/01/07: Updated with support for curved bricks.

2015/01/07: Updated with support for sloped bricks.

2015/01/06: Updated with support for DUPLO-style bricks.

2015/01/03: Updated with support for including horizontal holes to fit rods and axles, as seen in the Technic line of LEGO bricks.

2014/12/31: Updated with support for generating wings.

2014/12/30: Updated with support for hollow studs.

2014/12/30: Updated with perfect centering of knobs, posts, pins, axle holes, and reinforcements.

2014/12/30: Updated to print tiles upside-down to remove the need for reinforcement.

2014/12/30: Updated with newly accurate measurements.

2014/12/30: Updated to use a specific post wall diameter instead of an estimate based on the knob diameter.

LEGO®, the LEGO® logo, the Brick, DUPLO®, and MINDSTORMS® are trademarks of the LEGO® Group.