In searching for this answer, I did come across this post that is similar, though my question is more cosmetic than functional...
The sense of Truesight states:
A monster with truesight can [...] perceive the original form of a shapechanger or a creature that is transformed by magic.
Many dragons, such as the Ancient Bronze Dragon have the action:
Change Shape. The dragon magically polymorphs into a humanoid or beast that has a challenge rating no higher than its own, or back into its true form.
I've always thought of True seeing as simply seeing things as they are in this regard, as seeing the white complexion of a changeling. However, while observing this trait from the dragon, something occurred to me that seems odd:
A wyrmling is a medium size, meaning there might not be much hight difference, but an ancient dragon is Gigantic, meaning their true form would be quite massive
So trying to visualize how this would seem tends to create certain issues:
- The size of a dragon being now smaller could fit into spaces a large dragon could not
- If the dragon used a form with additional limbs, such as a spider, would those appear to the creature with Truesight?
- Given the size difference, how would one aim for the dragon?
Given that, I am wondering How would Truesight work on such a creature whos size changes, such as the dragon? Would they see a tiny dragon 6-7 ft tall? or be staring into space as they talked to it?
Another example of this is a polymorphed Tyrannosaurus... Would the truesight creature gain a disadvantage on the creature's attacks, only seeing the person within?