What is a significant disadvantage of a 3D scanner?

Choosing the option related to the size of a 3D scanner highlights a notable disadvantage that can limit its portability and application in various environments. While 3D scanners may vary in size, many professional-grade devices can indeed be quite large, often comparable to a small fridge. This size can pose challenges for users who need a compact or mobile scanning solution, making it difficult to transport the scanner to different locations or use it in confined spaces.

The other options, while potentially relevant to specific scanner models or technologies, do not capture as universally acknowledged a drawback as the size issue does. Complexity, the need for special equipment, and inaccuracies in output can vary widely depending on the model and intended use. However, size remains a fundamental concern that directly impacts usability across different contexts.