Samael Aun Weor provided many methods to awaken clairvoyance. The only way to know the nature of spiritual perception is to develop it, since while we could give many descriptions about conscious perception, it will not be as useful as developing the actual practice to know it directly. This is why Samael Aun Weor spent a lot of time explaining practices to develop clairvoyance than making lists about what people will see, since such lists are arbitrary for those who are awakening for themselves.
If you study the writings of Samael Aun Weor, he gives many clear indications about things that a conscious person can see, which are very clear for those who have awakened clairvoyance. Therefore, keep practicing!