Shape Commands: Cuboid, Line, Triangle, and Sphere

How to use Voxel Telephone’s shape-drawing commands — /cuboid, /line, /AbnormalTriangle, and /SphereSlow — including modes and parameter details.

Shape commands let you draw geometric volumes and outlines across your 64×64×64 voxel space in one operation. Each command is interactive: the server will ask for a block type and one or more position markers. Supply arguments up front to skip some of the prompts.

/cuboid — fill or outline a rectangular volume

Aliases: /z

Draws a cuboid (rectangular box) defined by two corner positions. With no arguments, the block is inferred from your held block and the server asks you to mark two positions.

/cuboid
/cuboid <block> [mode]

Examples:

/cuboid 9 hollow
/cuboid hand walls

Modes

The optional mode parameter changes the appearance of the resulting cuboid. The default mode is solid.

Mode	Result
solid	Fills the entire volume with the chosen block.
hollow	Places blocks only on all six outer faces, leaving the interior empty.
walls	Places blocks only on the four vertical side faces — no floor or ceiling.
holes	Fills the volume in a checkerboard pattern: every block at a position where (x + y + z) is even is placed, and the rest are left as air.

To use a mode, you must also supply a block ID or hand. For example: /cuboid hand hollow.

/line — draw a straight line between two points

Aliases: /l, /ln

Draws a single-block-wide line between two positions using a 3D Bresenham-style algorithm. The line always passes through the start and end points exactly.

/line
/line <block>

Mark the start position, then the end position. The server places blocks at each computed step along the line.

Lines work in any direction — horizontal, vertical, or diagonal through all three axes at once.

/AbnormalTriangle — fill a triangle through three points

Aliases: /triangle, /tri

Draws a filled triangle defined by three arbitrary positions. The command finds the longest edge of the triangle and sweeps lines from it toward the opposite vertex to fill the shape.

/AbnormalTriangle
/triangle
/tri

Mark three positions in any order. Because the fill algorithm sweeps from the longest edge, the resulting triangle may have small holes at certain orientations — hence “abnormal.”

The triangle is filled with individual block-wide lines. In some orientations, gaps of one block may appear along the edges. This is expected behavior.

/SphereSlow — draw a solid sphere

Aliases: /sphere, /sp

Draws a solid sphere. You mark the center point first, then an offset point — the radius is computed as the largest axis-aligned distance between the center and the offset.

/SphereSlow
/sphere
/sp

The command tests every block in the bounding cube against the sphere equation x² + y² + z² ≤ r² and places a block wherever the condition is satisfied.

The radius is capped at 32 blocks regardless of how far apart the center and offset points are. Large spheres near this limit can place tens of thousands of blocks and may cause a brief pause while the level reloads.