Because DAE is the file that includes SU.
The size of the DAE file should be determined by how many faces are in SU, i.e. the more curved faces (that is, shaped faces) there are in SU, the larger the exported DAE file will be, and the DAE file should be calculated as a triangular face.
If you want to export a small model, you should simplify the faces in the SU model, for example: if you can use the polygon tool to make a sphere or column in SU, you don't need to use the circle tool to do it, and you can see that basically the same effect of the cylinder with the polygon tool to pull it much smaller than a straight C.
DAE is a kind of 3D model that can be imported by flash. 3dmax and maya need to install dae output plugin to output the file with .dae extension.
Three-dimensional models are often generated using specialized software such as 3D modeling tools, but they can also be generated using other methods. As a collection of points and other information, a 3D model can be generated manually or according to a certain algorithm. Although they usually exist virtually on a computer or in a computer file, similar models depicted on paper can also be considered 3-D models.
Three-dimensional models are widely used wherever three-dimensional graphics are used. In fact, their use predates the popularity of 3-D graphics on personal computers. Many computer games use pre-rendered 3D model images as sprites for real-time computer rendering.
Summary:
Three-dimensional models are now used in a variety of different fields. The medical industry uses them to make accurate models of organs; the movie industry uses them for moving characters, objects, and realistic movies.
The video game industry uses them as a resource in computer and video games; in the sciences, as accurate models of chemical compounds; in architecture, to show proposed buildings or representations of landscapes; in engineering, to design new equipment, vehicles, structures, and other applications; and, in recent decades, in the earth sciences, to build 3-D geological models.