Final answer:
Using distance estimates is acceptable when doing a rough sketch of a scene; they provide helpful guesstimates for an artist's initial composition, although they may not be as accurate as precise measurements.
Step-by-step explanation:
When doing a rough sketch of a scene, using distance estimates is acceptable. It is especially useful in outdoor scenarios, such as for hikers or scouts estimating the distance to a landmark.
The accuracy of these estimates might not always align with precise measurements, as evidenced in the case where an early estimate significantly differed from the final approximation. However, these estimates offer valuable guesstimates that can inform an artist's perspective and composition when creating the initial structure of a scene.
It is important to understand the rough estimates may have discrepancies when compared to carefully calculated distances, but they remain a pivotal part of the artistic process when sketching out a scene.