This is a new camera mod for KSP, replacing current flight camera behavior, and something I've wanted in KSP since I first moved the camera back in 0.19. The main thing is the pitch limit and roll lock have been removed. Those familiar with Blender's trackball camera orbit mode will likely feel at home (NOTE: that's trackball, not turn-table, which has been the default for many years: Preferences -> Navigation for the curious). Anyway, with practice, ANY camera angle is achievable. Below