When Christ rose from the dead, he ha s "revitalized" glorified body that the disciples saw, touches, and ate with. It had scars, but was "refashioned" to do things like "appear" in the midst of them.
The question around the spirit of a man is an interesting one in general. According to science, when a person dies thier body looses a certain amount of wieght. Seems like the soul of a man has a "weight to it." God is called "holy" which coems from the hebrew idea of "weightiness." At the same time, 1 Timothy tells us that God is invisible. The Scriptures do not tell us that men's spirit's are invisible, or angels are invisible, but only God is invisible as an infinite being.
We have a few instacnes of people being seen and comprehended in the Bible, The Rich man, Moses and Elijah when appearing with Christ on the Mount, and all sorts of angelic apearences. The Scripures also tell us that when we die our bodies return to dust, and our souls are no longer attached to them.
The passage in revelation says this:
Revelation 6:9-11 When He opened the fifth seal, I saw under the altar the souls of those who had been slain for the word of God and for the testimony which they held. 10 And they cried with a loud voice, saying, "How long, O Lord, holy and true, until You judge and avenge our blood on those who dwell on the earth?" 11 Then a white robe was given to each of them; and it was said to them that they should rest a little while longer, until both the number of their fellow servants and their brethren, who would be killed as they were, was completed.
Seems like these souls had the ability to be seen, clothed, and awating a final consummation of things. Obviously sentient. They, though, did not have a glorified body, as Christ's was, the firstborn among many brethren. We too, will one day be raised in a new body, not like our earthly bodies.
When we are in heaven, Paul tells us that we are "absent from the body" and present with the Lord. Same would go for those in hell, though we still ahve the ability to see a form, and know exactly who people are. (Spiritual mysteries are fun eh?)
We can conjecture that God allows our spirits some form to be seen, but the Scriptures simply do not tell us what the material substance (other than disembodied souls) are like when we die. It is certain, based on texts, that we will see others, talk with them, feel, think, etc. That does not, however argue for any kind of body, and could be argued for the exact opposite.
Here is how the Confession deals with this:
Q86: What is the communion in glory with Christ, which the members of the invisible church enjoy immediately after death ?
A86: The communion in glory with Christ, which the members of the invisible church enjoy immediately after death, is, in that their souls are then made perfect in holiness,[1] and received into the highest heavens,[2] where they behold the face of God in light and glory,[3] [b:7e8adc52ed]waiting [/b:7e8adc52ed] for the full redemption [b:7e8adc52ed]of their bodies[/b:7e8adc52ed],[4] which even in death continue united to Christ,[5] and rest in their graves as in their beds,[6] till at the last day they be again united to their souls.[7] Whereas the souls of the wicked are at their death cast into hell, where they remain in torments and utter darkness, and their bodies kept in their graves, as in their prisons, till the resurrection and judgment of the great day.[8]
1. Heb. 12:23
2. II Cor. 5:1, 6, 8; Phil 1:23; Acts 3:21; Eph. 4:10
3. I John 3:2; I Cor. 13:12
4. Rom. 8:23; Psa. 16:9
5. I Thess. 4:14
6. Isa. 57:2
7. Job 19:26-27
8. Luke 16:23-24; Acts 1:25; Jude 1:6-7
Basically it says this same thing in a few places.