The relative areas of different parts shift with changes in the distribution of creatures within them. The resolution of an area is defined by the perceptions of the organisms perceiving it. Plants give very blurred, low-resolution images so forests generally show little detail, humans the most high resolution so cities tend to be very well defined. Invisible beings and attacks will tend not to visible on the spirit plane. It is possible for things to escape from the collective unconscious and wander the spirit plane.
Objects are visible by their being perceived, but have no shadows.
Their colour depends on how they are perceived. There is no moon. All objects visible in the sky are life bearing. Positive' emotions give brightness, 'neutral' ones silver-greyness, and 'negative' emotions feel dark. Death camps, for example, are truly horrible.