Questions tagged [3d-space]

For questions that primarily involve calculations, coordinates, and movement within the imagined 3-dimensional space of the game world.

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Can I use Dimension Door to teleport onto the shoulders of an ally?

A friend and I are having a dispute on the wording of the spell description and mechanics behind Dimension Door. He attempted (and succeeded) in a creative use of the spell in a game he is in, and ...
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8 votes
0 answers
52 views

Starfinder Teleportation: Geosynchronous Orbit?

Teleportation rules in Starfinder are sketchy. In combat two ships are not moving proportionately and Teleportation is impossible. However, if ships are stationary and not in combat, teleportation ...
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19 votes
1 answer
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When casting the Control Water spell underwater, does the Part Water option create a cube of air?

The control water spell has the option to separate water and form a trench on a cubic area of up to 100 feet per side: Until the spell ends, you control any freestanding water inside an area you ...
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7 votes
1 answer
373 views

Can Tidal Wave be cast in midair?

Nowhere in the text of the spell does it say that it can't be, or that it has to be cast or water or ground. I cast it for the first time recently and the DM and another player both expressed concern ...
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3 votes
1 answer
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How large is the whirlpool when a Nereid uses their Shape Water (Control Water) feature?

The nereid from The Hidden Shrine of Tamoachan has a special feature called "Shape Water" (not to be confused with the shape water cantrip), which does the following: Shape Water. The ...
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4 votes
2 answers
622 views

Does the Wall of Fire spell damage creatures above it?

The Wall of Fire spell describes its "damage zone" as: One side of the wall, selected by you when you cast this spell, deals 5d8 fire damage to each creature that ends its turn within 10 ...
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  • 1,077
7 votes
0 answers
61 views

What range scale does a human-sized Mek-Pirate use?

Some of the really nice tech in the Mekton Workshop costs a lot. Cloaking demands to add 0.8 to the final cost multiplier for active, fire control, combat cloaking 1. And another 0.33 for a the dirty ...
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8 votes
2 answers
567 views

How much HP does a mountain range have?

How much HP does a mountain range have? And I don't mean a mountain, I mean a mountain range. Specifically Kondyor Massif It's technically a crater, but close enough. Basically I'm homebrewing a ...
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7 votes
2 answers
898 views

Are there any penalties for fighting in the same 5ft space?

A scenario occurred in my game tonight where the wizard used mold earth to cause a scenario of my barbarian and an opponent to be trapped in a 5x5 ft space that was 15ft down. We played it as normal, ...
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9 votes
3 answers
3k views

Can archers bypass partial cover by arcing their shot?

There are two basic ways an archer fires at a target. In close quarters engagements, archers (and anyone using a projectile weapon) would likely use "direct fire", ie. fire at an angle ...
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3 votes
1 answer
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Does Improved Grab pull in the grappled regardless of weight?

Reviewing the choker I noticed the default strength is only 16. It caused me to wonder if an improved grab can pull a creature up in the air even if the strength does not have enough to carry (...
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10 votes
1 answer
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Does the Evard's Black Tentacles spell affect the 5-foot cubes above its area?

I'm playing in a Tomb of Annihilation game, and there were some succubi that we were fighting. We had information ahead of time that a lot of them were grouped up together talking to someone, and so I ...
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20 votes
1 answer
1k views

Can you flank from above?

If a character is on top of a creature, does this count for flanking? Context: a group I play in was killing a dragon, and one of my fellow players (a fighter) grappled it and hung on to its neck. One ...
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3 votes
3 answers
312 views

How do I handle targeting and areas of effect in 3-D?

I'm totally OK with regular grid and counting squares for purposes of movement, spell and weapon targeting, and determining areas of effect. Area shapes neatly match with measurements made square-by-...
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10 votes
1 answer
1k views

Are There 3D Rules for Flying and Distance?

I recently had a problem come up in a session that I wanted to see if there was more information on. One of my players is playing a Light Domain cleric; its 1st-level Warding Flare feature says, in ...
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  • 103
29 votes
5 answers
9k views

How can I effectively map a multi-level dungeon?

My players are getting awfully close to entering a multi-story pagoda dungeon that exists in my game. I think it'll be a fun adventure, but I find that I am worried about trying to map it all out for ...
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8 votes
1 answer
457 views

What is the volume of a suspended cauldron?

DMG p. 255 provides the stats for siege equipment, and lists suspended cauldrons among them: A cauldron is an iron pot suspended so that it can be tipped easily, spilling its contents. Once emptied, ...
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22 votes
4 answers
10k views

How do I calculate the volume of a given quantity of coins?

Question A rectangular chest is filled to the brim with 1,000 unevenly piled gold coins, each weighing one third of an ounce. How big is that chest? Is there a formula I can use for routinely ...
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31 votes
4 answers
7k views

How many copper coins fit inside a cubic foot?

I have a Wizard who is level 5, currently running in a pirate campaign (homebrew), and I thought about some scams I could pull to earn the ship some extra coinage whenever we touched port to resupply ...
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2 votes
5 answers
630 views

What is an effective system for a random shot from a ranged weapon in 3 dimensions? [closed]

A couple of times in my current campaign (D&D 5e), one of my players has elected, due to blindness, or darkness, to make a random shot in a random direction (including vertically, not just ...
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7 votes
3 answers
1k views

What is the volume of one Alchemist's Fire?

After a heated argument about the size of a flask of alchemist's fire with my DM, we've reached the ruling that any and all alchemical splash weapons are one ounce vials because he's sure he read that ...
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16 votes
1 answer
2k views

Can you fly over a Medium enemy creature in a 10ft tall corridor?

Let’s say you, a Medium character, are in a 5ft wide, 10ft tall corridor, and that a Medium enemy creature stands in your way. You wish to go behind the enemy creature using your fly speed (either ...
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14 votes
3 answers
4k views

Does flying upward cost more movement?

Let's say an Aarakocra, with a native flying speed of 30ft, starts to fly upwards. Does her 30ft flying speed bring her to a height of 30ft or does moving up 1ft cost more than 1ft of available ...
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19 votes
2 answers
2k views

Does Evard's Black Tentacles only go "up"?

Recently, I was running a game where the party was flying in an urban environment to face off against a wizard. They were all bunched together next to a building about 20' up to avoid attacks from ...
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  • 2,833
4 votes
3 answers
197 views

Good mapping tools for odd topologies [closed]

I'm looking to host a game that takes place in an asteroid terrarium traveling through interstellar space. Does anyone know of mapping software for 1) the inside of the asteroid, which resembles the ...
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6 votes
2 answers
1k views

Is there a limit on the volume of material that can be affected by the Minor Alchemy class feature?

PHB Page 119, Wizard, School of Transmutation, Minor Alchemy: For each 10 minutes you spend performing the procedure, you can transform up to 1 cubic foot of material. After 1 hour, or until you ...
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3 votes
1 answer
212 views

How do I determine the argument of periapsis in GURPS Space? [closed]

I am currently in the process of writing a program that generates a GURPS Space star system according to the RAW. For the final output format I intended to make plots of the orbits, thus this question ...
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  • 257
9 votes
1 answer
493 views

How does Phasing interact with the Z-axis?

The glossary entry for Phasing is rather sparse, and doesn't seem to address any specific issues that could arise while phasing. Phasing: While a creature is ...
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4 votes
2 answers
4k views

Aerial combat in 3.5e

I have a player who is using a homebrew flying race to add to his heal/buff cleric's survivability. He's promising not to use it too much to his advantage, especially because none of us have any ...
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8 votes
1 answer
3k views

How high can the Black Tentacles spell reach?

The spell Black Tentacles does not say how high they can reach up. Could it grab some Stirges that fly over the area of effect for example?
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5 votes
5 answers
767 views

Do creatures occupy cubic space, or are larger creatures still one square tall?

Does a large creature need to squeeze to fit into at 5' tall passageway?
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13 votes
4 answers
2k views

What counts as ground for Tenser's Floating Disk?

What counts as ground for this ritual, if you have a 5x5 piece of stone/paper/metal/wood under the disk, and that is moved up, say 10 feet, would the disk phase through that stone, or hover 1 foot ...
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  • 841
5 votes
1 answer
750 views

Is there a high limit on how high the Tenser's Floating Disk will fly?

Is there a high limit on how high the disk will fly? If i'm on it and use a move action to go "UP" how far will it go before it refuses to go any farther? I did not see any mention of high limits ...
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  • 841
7 votes
2 answers
340 views

How much vertical space do a rider and mount occupy together?

How much vertical space do a rider and mount occupy together?
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  • 6,155
5 votes
3 answers
221 views

Do tall creatures have to duck elevated obstacles?

Are there rules concerning the interaction between a creature and elevated obstacles? Example: Say, you have the following. Tall Goliath (7'8") Short Gnome (3'4") Short Kenku (5'0") Short Human (...
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  • 6,155
12 votes
3 answers
745 views

Does blade barrier have to be anchored to the ground?

If I cast blade barrier, does it have to be anchored to the ground? Or can I have it float anywhere I want that it could occupy, such as cast it above me as a sort of roof of blades?
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