Collada is an open-standards 3D geometry exchange format based on XML. Currently, it is mainly used in conjunction with KML/KMZ as an embedded container for geo-referenced 3d models. You should consider it a legacy format for all other use cases as it lacks in support for modern materials (e.g. PBR) as well as in import/export support in the major 3d apps. It is recommended to use glTF as an alternative.
See the general export options.
CGA mapping to Collada and examples
The following table lists the mapping of the major CityEngine elements to Collada elements.
The instancing/multi-texture behavior of Collada is similar to FBX.
|Whole scene or selection|
|Leaf shapes |
(with references to assets and materials and optional transformation matrices)
|CityEngine bump/normal maps|