The beatific vision consists, as the Catholic Church teaches, in seeing God’s essence, i.e, face to face, as He is. This is essentially an intellectual vision because God is immaterial and can’t be seen with bodily senses, for example, our eyes, for God dwells in inaccessible light. There is no sense in trying to imagine what this vision will be like because the imagination can only imagine corporeal images but God is not a body nor is he composed of matter. For example, the imagination is of no help in trying to imagine what our soul may look like or angels. Our soul and the angels are immaterial like God. We simply draw a blank if we try to imagine what immaterial substances look like. This is because human beings are a composite of soul and body and because of this union of soul and body and our placement in the physical universe, it is natural for us to gain knowledge of things through the images of those things we receive through our senses. This is how God created human beings. At the same time, since our souls are immaterial, we do have knowledge of immaterial concepts such as truth, justice, law, temperance, good and evil, humility, wisdom, morals, God, angels, etc; but we can’t imagine these concepts, we understand them through our immaterial intellects.
The orthodox do not believe we will see God’s essence in heaven but as you mention the Taborian light which is some kind of energy of God. However, St Paul affirms that “At present we see indistinctly, as in a mirror, but then face to face. At present I know partially; then I shall know fully, as I am fully known” ( 1 Corinthians 13:12). And St John says "Beloved, we are God’s children now; what we shall be has not yet been revealed. We do know that when it is revealed* we shall be like him, for we shall see him as he is ( 1 John 3:2). According to the words of Holy Scripture, the Catholic Church believes that in heaven we will see God as he is in himself, just as you see your mother, for example, right in front of you.