Quick Environmental Details

Aquatic

Sights choppy water, rolling waves, sunlight glinting, the curve of the horizon, driftwood
Sounds waves lapping against a ship, seabirds' cries, fluttering sails, creatures breaching the surface
Smells salt water, crisp fresh air, dead fish
Textures frigid water, slimy seaweed, crusty salt collecting on surfaces
Weather powerful winds, oncoming storms

Arctic

Sights blinding reflected sunlight, snowy plains, distant glaciers, deep crevasses, rocky cliffs, ice floes and bergs, animal tracks in snow
Sounds howling winds, drips of melting ice, utter quiet
Smells clean air, half-frozen bog, lichen, seaweed
Textures crunching snow, hard ice
Weather frigid gales, light snowfall, pounding blizzards

Forest

Sights towering trees, dense undergrowth, verdant canopies, colorful wildlife, dappled sunlight through the trees, mossy tree trunks, twisted roots
Sounds rustling leaves, snapping branches, animal calls
Smells decomposing vegetation, flowering plants, pine trees, earthy mushrooms
Textures leaves crunching underfoot, scraping branches, water dripping from above, rough bark
Weather still air, cool shade, sporadic breeze, rain on the canopy, branches coated in thick snow

Mountain

Sights bare cliffs, snow caps, hardy trees, slopes littered with scree, birds flying on currents, fog among the peaks
Sounds howling wind, falling rocks, clear echoes, crunch of rocks underfoot, distant avalanche
Smells blowing dust, pine trees, fresh snow
Textures rough stone, powdery snow, unstable rubble
Weather swirling clouds, chill of high altitude, direct sunlight, powerful wind and rain

Plains

Sights grass waving gently, scattered wildflowers, rocky outcroppings or boulders, the curve of the horizon
Sounds rustling wind, birdsong, distant sounds carried far
Smells fresh air, earthy soil, distant carcasses
Textures touch of tall grass, rasp of scrub brush, crunch of dry dirt
Weather cooling of gentle wind, heat of direct sunlight, massive black thunderclouds

Swamp

Sights lush leaves, clouds of gnats, algae-coated water, shacks on stilts, darting fish
Sounds croaking frogs, chirping insects, bubbling, splashing
Smells rich moss and algae, pungent swamp gases
Textures pushing through floating detritus, tangling creepers, thick mud
Weather oppressive humidity, still air, pouring rain, rays of sunlight

Underground

Sights winding passages, sputtering yellow torchlight, uneven or cracked floors, ancient writings or architecture, stalagmites and stalactites
Sounds dripping condensation, scurrying rats or insects, distant clunks of machinery, tinny echoes of your voices and footsteps
Smells staleness of still air, sulfur, tang of metal deposits
Textures rough rock walls, erosion-smoothed stone, cobwebs
Weather chill of underground air, geothermal heat

Monitoring Spell Durations

Spell durations are approximate values that codify the vagaries and eccentricities of magic into a convenient number. However, that doesn't mean you can set your watch by a spell with a 1-hour duration. This is one of the reasons the passage of time outside of encounters is in your hands and isn't as precise as encounter rounds. If a question arises about whether a spell has expired, you make the call. You shouldn't be punitive, but you also shouldn't treat characters like they move with clockwork precision and perfect efficiency between encounters.

There are two times these durations matter most: when players try to fit multiple encounters within the duration of a spell, and when they want to use a spell before a fight and keep it in effect during the encounter.

Multiple Encounters

A 1-minute spell should last for multiple encounters only if the encounters happen in very close proximity (usually in two adjoining rooms) and if the PCs go directly from one fight to the next without leaving encounter mode. If they want to stop and heal, or if the party debates whether to go on, the process takes enough time that the spell runs out.

Be more generous with spells lasting 10 minutes or more. A 10-minute spell easily lasts for one encounter and could continue for another if the locations are close. A 1-hour spell usually lasts for several encounters.

Before A Fight

Casting advantageous spells before a fight (sometimes called “pre-buffing”) gives the characters a big advantage, since they can spend more combat rounds on offensive actions instead of preparatory ones. If the players have the drop on their foes, you usually can let each character cast one spell or prepare in some similar way, then roll initiative.

Casting preparatory spells before combat becomes a problem when it feels rote and the players assume it will always work—that sort of planning can't hold up in every situation! In many cases, the act of casting spells gives away the party's presence. In cases where the PCs' preparations could give them away, you might roll for initiative before everyone can complete their preparations.