Object Mirror represents a plane, its front surface reflects objects located over or in front of it. Back surface of mirror is not visible. It is possible fasten to mirror a plane of the same size in Tree of objects. Then this plane will be back surface of mirror.

To have reflected mirror, material of its front surface should be transparent. You must select Transparency or Additive from drop-down list Blending mode in dialog Material editor. Also use the channel Alpha during choice of colors (the white color of this channel means absolute opacity, black color - absolute transparency). Thus it is possible to make a mirror semi-transparent (visible) or transparent (invisible).

Color of object reflected in mirror is color of back surface of source object.
Note: you can not fill a mirror by texture.

Group Sizes defines the sizes of mirror. Position of mirror and its sizes allow to see complete reflection of source object or only its part.
Checked flag Transparent in Options allows to see objects, located from back surface of mirror.

Example:
- source objects: yellow cube, textured plane, sphere and mirror.
- yellow cube and textured plane are located over mirror, therefore they are reflected in it. Reflections are green cube and textured plane.
- sphere is located under mirror, therefore it does not have reflection.
- material of mirror is given semi-transparent, that you could see it.
- flag Transparent in Options is unchecked, therefore when mirror is over sphere, sphere it is not visible.