Bridges and stairs cover the PC's tile in top-down view

[Grond]

With bridges the effect is intermittent.

[Krzysztof Dycha]

Maybe we should change rendering layers for Beings in top-down.

And we should definitely make top-down a separate mode not achievable in regular perspective (limit the top angle in perspective, give top-down a transition like ASCII).

It’s just hard to keep everything in check in perspective with two modes in mind.

[Jochen Terstiege]

Fixed