How to Open OBJ Files in Unreal Engine

Import OBJ into Unreal Engine, step by step

1. 1Check the fileKeep the .mtl file and any texture images in the same folder as the .obj, with their original names; the OBJ refers to them by name.
2. 2Import into Unreal EngineContent Browser › Import.
3. 3Check scale and orientationUnreal Engine works in centimetres and is Z-up. OBJ files are unitless, so the size depends on what the exporter assumed.
4. 4Check materials and animationOBJ carries basic materials in a separate .mtl file, and no animation. Look at the model under a neutral light before you build on it.

What comes through

Things to watch for

• OBJ imports as a static mesh with basic materials.
• Unreal works in centimetres. A model built in metres looks 100 times too small; tick Convert Scene Unit or set Import Uniform Scale to 100.

Questions

Does Unreal Engine support OBJ files?

Yes. Unreal Engine opens OBJ files as shipped: Content Browser › Import.

Why is my OBJ model the wrong size in Unreal Engine?

OBJ files are unitless, while Unreal Engine works in centimetres. Unreal works in centimetres. A model built in metres looks 100 times too small; tick Convert Scene Unit or set Import Uniform Scale to 100.

What is the best 3D format for Unreal Engine?

GLB and FBX are the most reliable choice for Unreal Engine. If you have a choice when exporting, pick GLB over OBJ.

Menu names follow Epic Games's current release. Check the official Unreal Engine documentation if your version differs.