diff --git a/docs/PROJECT_MAP.md b/docs/PROJECT_MAP.md
index dca6272..02a967f 100644
--- a/docs/PROJECT_MAP.md
+++ b/docs/PROJECT_MAP.md
@@ -254,9 +254,9 @@ Exploration only: never changes grains or the random stream.
 - functions: fogAlloc, fogMark, fogSeen, fogInit, fogLook, fogRevealAround, fogRevealAll
 - variables: FOG, FOG_SENSE, FOG_SENSE_FADE, fog, FW, FH
 
-### src/sim/cells.js (321 lines)
+### src/sim/cells.js (322 lines)
 Cell helpers (setCell, move, enter) and the falling-sand movement of powders, liquids and gases (simMove).
-- functions: setCell, swapCells, swapCellData, move, enter, enterFree, powderSpill, avalancheMove, powder, passable, liquid, liquidSearch, gas, wakeBotPowder, simMove, moveChunk
+- functions: setCell, swapCells, swapCellData, move, enter, enterFree, powderOpen, powderFall, powderSpill, avalancheMove, powder, passable, liquid, liquidSearch, gas, wakeBotPowder, simMove, moveChunk
 - variables: SORTP, SORTP_FUEL, LSTEP, LFILM, CORNER_SEAL, POWDER_FAN
 
 ### src/sim/heat.js (266 lines)