The Complete STEP to OBJ Conversion Guide

General Information

This guide is part of the RapidPipeline3D Formats Knowledge Database. It shows how to convert STEP to OBJ, if you'd like to know more about the formats, please check out the following links:

• Learn more about the STEP format
• Learn more about the OBJ format

Converting and Optimizing STEP Files to OBJ

There are various ways to convert between STEP and OBJ. With RapidPipeline, you can easily convert and and optimize STEP files, at scale. It supports OBJ, as well as many other file formats (examples:3dsMax,FBX,glTF,PLY,STL,USD,USDZ,VRM), at high quality.

Below you can find a video explaining how to convert your files:

What are STEP and OBJ files commonly used for?

TheSTEP file is a format mostly used for exchange of CAD data.
TheOBJ file is a format mostly used for 3D modeling and generalized 3D applications.

Limitations of STEP Files to OBJ Conversion Workflow

The following limitations should be taken into account when converting STEP files to OBJ format:

STEP Feature (not supported by OBJ)	Limitation Details
Free-Form Surfaces	Free-Form Surfaces: supported in STEP, but not in OBJ. Free-form surfaces allow a CAD user to design surfaces with advanced controls over curvature and continuitiy. While these surfaces are common for CAD models (in the form of so-called boundary representations or "B-reps"), they need to be converted to polygonal triangle or quad data to work with most 3D rendering engines - a process called tessellation. In this example, a surface patch is used to describe a part of a curved surface of a product. Without support for this feature, the free-form surface has to be tessellated into quads or triangles.
Hierarchical Scene Graph	Hierarchical Scene Graph: supported in STEP, but not in OBJ. Scene graphs are one of the most common concepts in 3D computer graphics. By structuring the scene in a hierarchical way, logical parts of it can be easily addressed and transformed. This is useful in many applications, like games or 3D configurators. Without support for this feature, a 3D scene cannot be structured hierarchically, for example objects cannot be logically composed of smaller objects.

What's the best way to get STEP files into my 3D applications, and are there alternatives to using OBJ?

Doing 3D conversion right, especially at scale, can be tricky, as 3D data is in general a rather complex (yet very powerful!) medium. This also applies to STEP and OBJ files - the conversion guide above provides a rough first idea about that. Once you know what you would like to do, tools likeRapidPipeline can help you perform the necessary steps, and to even automate the process for thousands or even millions of files.

Especially when introducing pipelines and workflows at scale in an enterprise context, it is usually good to rely on dedicated tools and expertise, making sure you do not introduce any steps into your 3D workflow that are detrimental to the final output's quality, or that take your team too much time (and money).

If you're interested to hire dedicated expertise from the best in the field to help your company reach your goals fast and reliably, please do not hestitate to contact DGG. Being the creators ofRapidPipeline, and ambassadors for open 3D standards for more than a decade, we have been building some of the world's most advanced 3D pipelines, having processed many millions of 3D assets.

Therefore, our expertise will help you to reach your goals faster, at scale, and with the least possible friction, since we are focused on maximum interoperability.

To get started with 3D data conversion and optimization today,sign up for a free account!

If you have any questions, feel free tochat with our human team.