How to Export STL from Cinema 4D (Import, Scale & Export)

Author: Arndt von Koenigsmarck · Last reviewed August 2026 

Getting a model onto the print bed starts long before the slicer. If you want a clean, correctly sized print, the model has to be imported properly, checked at real-world scale, and exported in the right format. This guide explains how to export STL from Cinema 4D, covering that whole first stretch of the process, from opening a file and correcting its scale to handing a finished STL to your slicer. It is part of our larger guide on Cinema 4D for 3D printing.

Cinema 4D supports most of the common 3D file formats you will encounter when working with printable, polygonal models. Among the most relevant are OBJ, VRML, STL, glTF, FBX, DXF, SKP and 3DS. To bring a file in, you simply choose File > Open… and Cinema 4D detects the file type automatically.

STL deserves a special mention, because it is the format most models on printing platforms are shared in. It is a pure polygon format, which means it carries no parametric information and offers no options for adjusting quality or polygon density on import. That has consequences for editing later, which we cover in the guide to fixing 3D models.

The first thing to check after import is almost always the size of the model. Objects created specifically for 3D printing are usually already at the correct scale, but you cannot assume this is always the case.

Select the imported object and look at the Size column in the Coordinate Manager. This manager is hidden by default, so if you do not see it, click its icon or choose Window > Coordinate Manager. In the third column you will find the object's dimensions along the X, Y and Z axes. These measurements should match the real-world dimensions you intend to print.

If the object was imported or modeled at the wrong scale, this is easy to fix. Copy or note down one of the incorrect dimensions of the model, for example along the Y axis, then open Edit > Scale Scene…

A small dialog box opens. Enter the current dimension value you noted in the Current Scale field, then enter the size you actually want in the Target Scale field. After you confirm with OK, every element is converted and scaled accordingly.

One reason Scale Scene is worth using rather than a manual resize is that it converts all scene properties consistently, not just the geometry. This includes things like light intensity decay curves and the projection sizes of materials. The size of objects and the distance of the camera from the scene also matter, for example when calculating blur effects during rendering, so keeping everything in proportion avoids surprises if you later render the same scene.

This is the single most common scaling mistake in 3D printing. Cinema 4D defaults to centimeters, while all common 3D printing slicers work in millimeters, which are one-tenth of a centimeter. If you use the default Centimeters unit, set the scaling factor to 0.1 in the STL export settings, so your model arrives in the slicer at the size you intended rather than ten times too large.

Once the model is at the right scale, you can export it for printing. In many cases the object you want to print is smaller than your printer's build volume, and the export is straightforward.

If there is only a single model in your project, choose File > Export > STL. If you want to export one specific object from a scene that contains several, select it in the Object Manager and choose File > Export Selected Objects as… > STL. The STL format is the most common input for slicer applications, which is why it is the natural handoff point.

If your model is larger than the build volume, you will need to cut it into printable sections first. That process has its own guide: how to split large 3D models for printing.

Slicers take your exported 3D model and generate data tailored to your specific 3D printer. They also create any additional geometry needed during printing, such as supports for overhanging structures.

Typically your printer ships with slicer software that is already compatible and optimized for it. If you need an alternative, there are capable commercial and free slicers that support a range of printers and printing methods. Popular free options include:

• PrusaSlicer

• UltiMaker Cura

• Creality Print

*Next in the workflow: once your model is imported and scaled, check it for mesh errors in how to fix 3D models for 3D printing.