The Complete STEP Enhanced to COLLADA Conversion Guide.
Table of Contents
- General Information
- Converting and Optimizing STEP Enhanced Files to COLLADA
- What are STEP Enhanced and COLLADA files commonly used for?
- Comparison of Features Supported by STEP Enhanced and COLLADA
- Limitations of STEP Enhanced Files to COLLADA Conversion Workflow
- What's the best way to get STEP Enhanced files into my 3D applications, and are there alternatives to using COLLADA?
General Information
This guide is part of the RapidPipeline 3D Formats Knowledge Database. It shows how to convert STEP Enhanced to COLLADA, if you'd like to know more about the formats, please check out the following links:
Converting and Optimizing STEP Enhanced Files to COLLADA
There are various ways to convert between STEP Enhanced and COLLADA. With RapidPipeline, you can easily convert and and optimize STEP Enhanced files, at scale. It supports COLLADA, as well as many other file formats (examples: FBX, glTF, OBJ, PLY, STL, USD, USDZ, VRM), at high quality.
Below you can find a video explaining how to convert your files:
What are STEP Enhanced and COLLADA files commonly used for?
The STEP Enhanced file is a format mostly used for product data exchange for manufacturing.
The COLLADA file is a format mostly used for 3D asset exchange for digital content creation.
Comparison of Features Supported by STEP Enhanced and COLLADA
| Feature | Supported by STEP Enhanced | Supported by COLLADA |
|---|---|---|
| Morph Targets | No | Yes |
| Rigid Animations | No | Yes |
| Skinned Animations | No | Yes |
| Animations | No | Yes |
| Free-Form Surfaces | Yes | Partial0 |
| Geometry Compression | Partial1 | No |
| Quad Meshes | Yes | Yes |
| Basic 3D Geometry | Yes | Yes |
| PBR Materials | No | Partial2 |
| Transparent Materials | Partial3 | Yes |
| Vertex Colors | No | Yes |
| Materials | Yes | Yes |
| Scene Composition | Yes | Yes |
| Hierarchical Scene Graph | Yes | Yes |
| Scene Nodes | Yes | Yes |
| Standardized Format | Yes | Yes |
| Embedded Textures | No | No |
| Multiple UV Channels | No | Yes |
| Normal Mapping | No | Yes |
| Procedural Textures | No | Partial4 |
| Texture Compression | No | No |
| Texture Transforms | No | Yes |
| Texturing | No | Yes |
Limitations of STEP Enhanced Files to COLLADA Conversion Workflow
The following limitations should be taken into account when converting STEP Enhanced files to COLLADA format:
| STEP Enhanced Feature (not supported by COLLADA) | Limitation Details |
|---|---|
| Free-Form Surfaces | Free-Form Surfaces Support: STEP Enhanced: Full support | COLLADA: Partial support   COLLADA Notes: Limited NURBS support, primarily polygonal Impact: 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. |
| Geometry Compression | Geometry Compression Support: STEP Enhanced: Partial support | COLLADA: No support   STEP Enhanced Notes: Compressed formats (.stpz, .stpxz) available for smaller file sizes Impact: Geometry compression describes the process of compressing the representations of a 3D model's geometry, usually a triangle mesh. 3D geometry compression does not change the topology of a 3D model, but just changes the way that a 3D model and its 3D positions and related vertex data is stored. Geometry compression can be lossy (just like JPEG compression in image processing can be lossy, for example), in which case one might notice slight artifacts like variations in 3D vertex positions (compared to the uncompressed 3D model). However, such differences are often not noticeable. There are only very few standards for geometry compression, like glTF's support of Draco compression and similar extensions. |
What's the best way to get STEP Enhanced files into my 3D applications, and are there alternatives to using COLLADA?
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 Enhanced and COLLADA files - the conversion guide above provides a rough first idea about that. Once you know what you would like to do, tools like RapidPipeline 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 of RapidPipeline, 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.
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