"maybe some of those "condensation" problems in the rain are unsolvable .... if the results hold ...
i wonder if the "misting" can aggravate condensation problems by introducing more moisture in the tent ..."
Yes, at times it is nearly impossible to eliminate condensation in a smaller tent. Even a tarp with much better ventilation has problems.
Generally, most people are taught that condensation happens at the interface where a cold surface meets saturated air. In actuality, it is not quite that simple. It happens at an equilibrium at that interface. Air does not have to be 100% saturated to produce condensation in a tent. The condensation occurs anyway. It evaporates anyway. These processes do not stop just because of condensation. Example: In a desert, under low humidity, a 10' tarp can give you enough water to drink under bright sunlight relying on modifying local conditions to drive condensation.
As water condenses, it releases heat, under many conditions, enough to drive re-evaporation. If the tent material was a real good insulator, condensation would NOT occur on it's surface.
Hence, (using water proof material in this hypothetical example) no interface between hot/cold and no real condensation...it would evaporate as quickly as it forms.
Another example: The temperature of a molecule is defined as it's movement. If it is moving very fast, then it is hot. So, the temperature of a molecule of water in space is usually very high. It is usually moving very fast, at what we would call super-heated steam heats. But, there are not enough of them. Space is very thin. So, the temperature we see is quite cold. Temperature and pressure are related.
Both examples make a strong case for a double walled tent, since rain will usually drop the temperature of the fabric, and act as a heat sink not allowing re-evaporation of a droplet when it does happen. A cool rain on a tent at nearly 100% humidity is about the worst conditions, ignoring misting and other things.
The two major factors effecting condensation in a tent are temperature and humidity. The higher temps inside a tent allow more moisture to be absorbed into the air. Adding to this is bad. Breathing alone will cause condensation. Hence the concern with floors, wet items in the tent, and any other sources of water vapour, besides your metabolism. Roger is absolutely correct. But, you can do nothing about your metabolism. You WILL get some. Sometimes it is a slight wetness when rolling up the tent. Sometimes the tent looks like it is raining inside.
Raw condensation can be annoying. But can usually be tolerated. In rain, any wetness is to be avoided. Condensation can be knocked off tent and tarp fabric as mist. This will cause a micro climate inside your tent. Cooling the warm/humid air can cause these seed particles to condense more rapidly than they evaporate. So, some of them drop on the sleeper. Others are re-evaporated...depends on their initial size. Everything in the tent gets damp. A couple days of this and they get out and out wet, AND, they always contribute to the internal humidity. Condensation begets condensation, if you will allow this generalization.
Because water is a bi-polar molecule, it tends to stick to other water molecules. Water surface tension is a pretty well known example. So, during a rainstorm, it usually happens that the air humidity, often at about 100% just before a rain, drops. During a rain storm, the air humidity is somewhat less because the drops will attract water molecules out of the air. This fact is not important to small tents, except, that improved or forced ventilation will allow less condensation to occur inside. A candle in the peak vent will help drive this
in the absence of a wind.
So, whatever the head pressure of cuben is, it appears to be water proof. Temperature inside a small tent will help drive ventilation and increase water absorption by the air (not exactly linear, though.) All of the above makes a good case for a double walled cuben tent under wet conditions regardless of whether the fabric is highly waterproof or not. The area between the two layers should be sealed to prevent heat loss and condensation. The venting should be to the inside of the tent, only.
So, two layers of .38oz/yd cuben should allow better wet weather performance. Does everyone need this? Does the additional weight of a two layer tent make sense? These are only a couple questions that only the market can answer. Maybe I am all wet with the condensation and cuben fabrics are not the magic bullet we are seeking. A better insulated fabric can help as much as much as a fully waterproof one with condensation. Just a thought...