Export the model as STL. That is a format commonly used by 3D printers. There has been numerous successful attempts at printing from mecabricks including mine.

Thanks!

If you have a big print, how would you crop it. Is there a way, or do you just have to make it smaller?

Is the design supposed to look blank when downloaded?

If I'm not mistaken, that's how STL files work. From Wikipedia:

STL files describe only the surface geometry of a three-dimensional object without any representation of color, texture or other common CAD model attributes. The STL format specifies both ASCII and binary representations.

[url]https://en.wikipedia.org/wiki/STL_(file_format)#:~:text😒TL%20files%20describe%20only%20the,both%20ASCII%20and%20binary%20representations.[/url]

If you want color information, you can export to a different standard. If you're using Blender, the .zmbx format carries the most information.