Exhausting these possibilities seems unrealistic at first. However, when CAD data is converted into detailed polygon models, they actually reach such polygon density. If the complexity of these models becomes too high, it affects the performance of the application - especially if the budget does not include the purchase of correspondingly expensive hardware. We may also want to provide a downloadable WebGL application or app that each user accesses on their personal device. This use case makes it impossible for us to assume powerful hardware in principle. So while, for example, a scene with 20,000,000 polygons would be appropriate for a movie, a reduction is necessary there in the interactive domain. This is done via so-called retopologization (retopo), in which, based on the highly detailed surface, a simplified surface is created.
Depending on the degree of reduction, this process can be automated and only needs to be evaluated and corrected by CG artists. Currently, however, human pattern recognition is more flexible than the computerized alternative. An accomplished CG artist can recognize the relevant aspects of a model at a glance. Performing a manual retopo takes more time, but the automatically generated result is clearly surpassed in terms of aesthetics and performance.