I recently read a blog post about how D&D at it’s core was a bookkeeping game. I really never gave much thought to encumbrance or arrows or torches, but the idea stuck with me. I don’t think I ever considered what would happen if a human ran out of torches in a dark dungeon, what a divine idea.
SimpleDnD already lists the weights of equipment, armor and weapons, so adding a weight limit is easy.
Max weight carried is Strength +4 (so a -3 would become +1) x 25 lbs.
Example: A cavalier with a strength of +3 would be able to carry 175 lbs.
Example: A wizard with a strength of -3 would be able to carry 25 lbs.
Encumbrance on Moving
Movement is reduced to 1/2 when carrying more than half of the character’s max weight.
Movement and Timekeeping
The speed listed on each race type is the distance a character can move unencumbered per turn (10 minutes). So if the characters moves 3 squares in a dungeon with 10′ x 10′ grid squares, then for every 3 squares, tick off a turn.
Searching a room also takes time, 1 turn per 30′ x 30′ space.
Hands and Holding
Characters have two hands. Period. They may not carry a torch and a sword and a shield. This goes for large sacks, rope, treasures, etc. Torches carried into combat have a DC 10 vs DEX chance of going out in the event of a successful attack on the carrier.
A single coin of any type weighs one ounce. So there are 16 coins in 1 pound.
140 carats of gems = 1 pound. A typical gem of 100gp should weigh about 1/10 lb
Torches are another wrinkle in the bookkeeping, they only burn for 1 hour (6 turns). That is an insanely short time period. I can see a torch burning out just as combat begins. If a torch burns out, apply the Special Attack Condition Blindness to all characters who are not longer in torchlight.
Furthermore, torches (and light spells) only illuminate 60 feet around them, anyone outside of that range would also suffer from blindness. Especially true if someone splits the party.
And what if, just what if, it is windy?!? It’s not uncommon for gusts of wind to flow down large corridors in caves, is it?