To dream of a lattice represents feelings about noticing or being aware of something without getting to experience it in full. Feeling that the truth is being revealed without being able to do anything about it. Experiencing the truth only subtly or hinted at.
Negatively, a lattice may reflect feelings about experiencing the people revealing the truth in some manner that you don’t like and not being able to do anything about it. Dishonesty that you can’t confront. Fake or bad people that you are slowly beginning to catch on to. Knowing you are right about someone negative, but not being able to prove it.
Alternatively, to dream about pattern represents feelings about inter-connectivity. A common image for users of hallucinogenic substances to reflect the spiritual euphoria of all life being connected or all life being connected to God. Consider the saying “We are all one.”