Add options for rendering mirrors

Welcome to our forum Chrid , your feedback will of course be noted, but please also check out this article right here:

Why are some of my objects/parts of my project not displayed in reflections?

At the moment, real time reflections are not easy to do, especially when everything should still perform well - especially objects outside your screen (the so called screenspace) will often times not be in the reflections, or only in a simplified manner.

We're working constantly on improving this behavior, you be sure about that!