We had a mountain trip planned.
We found a passion instead.

Sometimes solving one small problem
opens up a whole new chapter. That’s how it happened for us.

Iza+Sebastian

A small problem. A new beginning.

Illustration of a solar tracker and a cardboard prototype

It started
with a piece of cardboard.

For her engineering thesis, Iza was building a solar tracker — a system that follows the sun. The photoresistors needed a shield. The first idea? Cardboard. She soon realised she needed something better.

So we bought our first, basic 3D printer so the part could be designed and made. We had planned a trip to the Bieszczady Mountains, but instead we found something that stayed with us for longer: the joy of turning an idea into something you can hold in your hands.

That was the first of many “what if we printed it?” moments.

Something personal. For people we love.

Wedding keepsakes: a heart-shaped lamp, a guest magnet and wedding rings

Then we made
a few keepsakes.

At first, the printer only came out now and then. Then we had a very good reason to use it: our wedding.

We made magnets for our guests and an LED sign for the celebration. Small touches, but entirely ours, with a little of us in every detail.

After the wedding, we came back to printing with fresh energy. We wanted to see what else we could make together.

More ideas of our own.

Illustration of a technical drawing and a finished blue masonry line holder

From “let’s try it”
to “it works”.

A more capable printer followed, along with new materials and plenty of curiosity. We kept experimenting, increasingly with designs of our own.

That’s how our masonry line holder came about. Practical and carefully thought through, it’s now the product we’re best known for. A small “what if” that turned into something useful.

Take a look at our line holder

Green, blue, red, black and orange line holders on light plinths with a gold cord — One of our ideas. Five ways to make it yours.Color preview

04 / Still the two of us

Behind every project,
it’s still us.

We’re not a company or a large print shop. We’re Iza and Sebastian: two people who enjoy designing, printing and finding out what’s possible.

SI 3D Project is something we love doing together. And another reason to say: “come on, let’s give it a go.”

Your idea could be next

What have you been thinking of making?

Tell us about it. Your message could be the start
of something we bring to life together.

si3dproject@gmail.com

We had a mountain trip planned.We found a passion instead.

It startedwith a piece of cardboard.

Then we madea few keepsakes.

From “let’s try it”to “it works”.