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… modifiers that Foundry VTT currently offers and how to use them. For an introduction to simple dice concepts see the Basic Dice article. For more advanced dice rolling concepts, and API references see the Advanced Dice article. Roll Modifiers In addition to basic arithmetic and adding text comments to rolls, there are a variety of short-hand modifiers which can be used to change the way a dice roll is processed. These modifiers are conditional, and only trigger in certain (defined) circumstances. Re-rolls and Exploding Dice r : Reroll Rerolls the die based on the set condition, keeping the outcome regardless of whether it is better. Reroll (r) will only reroll the die once, for continual rerolling see "x : explode …

… modifiers see the Dice Modifiers article. Foundry Virtual Tabletop provides a comprehensive chat interface for delivering dice rolling expressions and formulae. Through use of paranthetical statements, dice pools, and variables it is possible to construct very complex formulae to be used for rolling dice. Parenthetical Expressions and Dice Pools When a roll command includes Parenthesis ( ) and curly braces { }, Foundry VTT interprets these as instructions to handle the roll in particular ways. These expressions are evaluated first before all other elements of a roll formula. Parentheses The contents of a parenthetical expression are always evaluated before the outer portion. This allows for options where the number, faces, or modifiers of a dice roll are themselves dynamic in some way. Using parenthetical …

… modifiers which can be used to change how dice work in order to support different game systems. For a comprehensive listing dice modifiers consult the Dice Modifiers article. Roll Modes There are multiple role modes available in Foundry. Before learning to roll dice, it is important to be familiar with the concept of "roll modes" which affect the visibility and presentation of dice rolls. Every dice roll becomes a message in the chat log, but the visibility of that message and the details of the roll can be controlled by the user. At the bottom of the chat log there is a drop down list of roll types, these determine who can see the roll made by your /roll command …