About Lampcaster
Updated 23 October 2026
Lampcaster makes the software that designs 3D-printed shadow lamps: small lamps with one LED inside whose walls throw a drawing across the wall. We are a small studio in Budapest, Hungary.
Why it exists
Designing a shadow lamp by hand means projecting a drawing onto every wall, allowing for the thickness of the walls, and then finding out on the print bed that half the fine detail was too thin to print. Each attempt costs hours of printing and a spool's worth of patience.
Lampcaster does that work before the first layer. You upload an SVG, it designs the walls, shows the shadow ray-traced through the real wall thickness, marks every line too thin for your nozzle, and hands you STL files ready for your slicer. The guide to printing a shadow lamp explains the principles behind it.
Built on a proven engine
The shadow engine behind Lampcaster was first built for laser-cut wooden lamps, and its files have been cut, assembled and hung on real walls. Lampcaster turns the same walls into one printable body:
- Exact projection. Every point of the drawing is mapped onto the walls through the LED, so straight lines stay straight and curves keep their shape.
- Both wall faces. Openings follow the inner and the outer face of each wall, so the shadow edges stay sharp at any wall thickness.
- Closed, printable meshes. The lamp body is checked to be a closed solid before it is offered for download.
- The LED faces the wall. Facing the room it dazzles and casts almost no shadow, so the app mounts it on an arm pointing back at the wall.
What you see is real
Every picture on this site, from the shadow previews to the unfolded walls and the printed body, is the studio's own output for its example designs. Nothing is mocked up, and we don't publish testimonials we can't show you the source of.
Get in touch
Questions, a design that won't come out right, or a lamp you've built that you'd like to show us: write to us through the contact page. You can also follow new designs and builds on Instagram and Facebook.