Sure!
My first draft for a wiki article "Lightgem" would look like this:
"
[[File:Hud.jpg|right|thumb|The lightgem is shown as part of the [[The_Dark_Mod_Gameplay#HUD_(Heads-Up_Display)|HUD]]:<br/>2. A breath indicator when underwater<br/>3. The lightgem itself<br/>4. A health indicator.<br/>Two wings flank the lightgem indicating if the player is crouching.]]
The '''lightgem''' is a light indigator on the [[The_Dark_Mod_Gameplay#HUD_(Heads-Up_Display)|HUD]] and an important part of [[The Dark Mod Gameplay]].
The lightgem itself indicates how visible the player is. The visibility is based on how much light is hitting the player, but also depends on whether you are crouched, moving, have a weapon drawn, or being under water.
The wings on either side of the gem indicates when the player is crouching.
Below the lightgem is a health indicator. When the player is injured, a small red bar appears below the lightgem. The bar shows how much health you have left and decreases from right to left. Health potions and various types of food will replenish health. The bar remains visible until the health is fully restored.
Above the lightgem is a breath indicator. When the player is under water, a small blue bar appears above the lightgem. The bar shows how much air you have left and decreases from right to left. When the bar runs out, you'll begin to take damage. Surfacing or using a Breath Potion will restore your air bar.
The lightgem is an object that the player always carries and is not visible in the [[inventory]].
A user can disable the lightgem and the wings in Settings - Gameplay - General - Hide Lightgem. The health indicator and breath indicator will remain visible.
[[Category:Equipment]]
"
(With the caveat that I would need to use the preview-functionality to fix any formatting errors I may have made before publishing it.)
I would also
* link "BREATH INDICATOR", "LIGHTGEM", and "HEALTH INDICATOR" from "The_Dark_Mod_Gameplay#HUD_(Heads-Up_Display)" to the new article "Lightgem".
* create "health indicator" redirecting to "lightgem" ("#redirect[[lightgem]]")
* create "breath indicator" redirecting to "lightgem"
I registered on The Dark Mod Bugtracker on 29 December and I have since reported 68 issues from a personal log of issues that I had assembled during hours of testing TDM 2.11. The reports are not perfect, but I think they show my intentions are good.
I understand the reluctance, especially if there have been incidents of spammers on the wiki, but as an open source project relying on volunteer work it is also important to keep a low threshold for contributing to the product. If I'm not up to par, you'll discover it quickly. Or, rather, you would have already discovered it in the Bugtracker.