Shaded "Camera" in all views. For orientation identification.

The "camera" is created as a set of solid black lines, with only the "up" orientation identified. However, because there is no "depth" to the lines, the "toward you" or "away from you" view looks exactly the same. This makes it impossible to see the orientation of the camera, unless you actually rotate the view up above the camera and pan to one side or the other.

Drawing the lines so the "far lines" are slightly lighter and the "close lines" are solid black... You can then clearly see the orientation as the camera looking "away", will have the black edge being the widest and when looking "toward", the lighter line will be most outward.

This could also extend into every line drawn, as if being drawn "through fog", with a simple gradient-mask, which represents "depth". The back-side lines would all be slightly lighter and any close or front-face lines would be dark or solid black. (A gradient mask isn't required and a simple z-order quick-coloring/shade, would be fine.)

This would also be a desired concept for the axis-adjustment tool... So you could clearly see that the arrows are pointing away or towards the screen, clearly.

Even if the "UP" indicator on the camera were to just be black on the back, and white on the front of the arrow face... (such that it virtually indicates the front, as a "light")... You could then see if the camera was angled towards or away from the screen.

Lights could also use this global "z-order" style of solid shading, just to quickly see if a light is closer or further away, from the screen. The more lights, the more shades of grey you would use. Less lights, you would use less shades, but clearly indicated "levels" of grey separation, between lights in the view. (Or whatever color is appropriate. Honestly, I think lights should be yellow or cyan colored and the camera should be green or red color, so it stands-out more appropriately among all the black and grey of the default setup.)