It seems to me that we really do not know what we will look like in the spirit in heaven. But I doubt that we are just blobs of light without faces. I look forward to seeing my husband of 35 years. And all my family. Very few are left now. We are surrounded by a “cloud”, those who have passed on, Paul said. Is this where the idea came from that we will look like ghosts or wisps of smoke? Jesus did say to His disciples when He appeared to them after He rose, that he was not a ghost or spirit. So they must have believed that a spirit or ghost would look like a person. And He did not correct that did He?
The Bible is pretty clear that in our next life we’ll be physical beings similar to the way we are now but immortal (1 Cor. 15:51-53). John said we don’t know yet what we will be, but when the Lord appears we will be like him (1 John 3:2) and He was and is a physical being.
When the writer of Hebrews mentioned the great cloud of witnesses (Hebrews 12:1) he was using a figure of speech, similar to the way Ezekiel described the many nations advancing on Israel like a storm, like a cloud covering the land (Ezekiel 38:9). In both cases they were referring to a huge number of people.
In Luke 24:37 the disciples saw Jesus after the resurrection and thought they had seen a ghost because they had heard of ghosts appearing to people. But no one had ever seen or even heard of a resurrected man before, and that’s why He told them to touch him and see for themselves that He was not a ghost.