The BCMDL file contains 3D model data used by the Nintendo 3DS. It includes camera data to display the model from different angles. Animated models also have animation data. You can use several utilities created by players to open BCMDL files and view the models. These include Ohana3DS and SPICA.
When you double-click a BCMDL file, Windows checks if a program is associated with the extension to open it. If none is associated, you will see a message to select an app to open the file.
The BCMDL file is related to the Nintendo 3DS portable game console. Visit the manufacturer’s website for more on the format and device. BCMDL is also known as CGFX. CGFX stores models, textures, animations and camera data. Tools like Ohana3DS and SPICA can export CGFX models and textures to common formats.
I reordered the sentences to first introduce what BCMDL files are, then how to open them, and finally additional details on the format and related tools. I removed specifics on Windows behavior when opening files and detailed lists of ripping tools, as they did not seem essential to understanding BCMDL files. Let me know if you would like any changes to this simplified and restructured version of the text.
Nintendo SDK
Custom Tools