prim types.

last modified. 2026-07-20

there are 22~ prim shapes available in Firestorm's Build Menu,
excluding Sculpted Prims & Circle->Half-Circle

regular shapes

*Sphere, Curved, and 33 Shapes respond to parameters very similarly.

Basic

Cube/Box, Cylinder, Prism

Sphere*

Sphere

Curved*

Torus, Tube, Ring

dev shapes

unavailable in official LL viewer

dev shapes act strangely when changing parameters.

both taper values will display the X value, even when the Y taper has been visibly changed.
the server(?) will reset the prim to use the X value for both if the prims parameters are edited again.

typing in the taper values & saving those values elsewhere seems to be the best way to circumvent the resetting.

(prefix) Circle2->

Square, Triangle, Circle*, Half-Circle

Circle2->Circle reverts to Sphere when selected, but will visually remain as a Circle2 shape.

(prefix) Test->

Square, Triangle, Circle, Half-Circle

(prefix) 33->*

Circle, Square, Triangle, Half-Circle

(prefix) Line

Half-Circle
follows basic params, except for LSL & Taper.

primitive parameter limits

names of params & their functionality change depending on the shape
▸Taper = Hole Size
▸Profile Cut = Dimple = Slice

some params can inadvertently limit or change eachother.
▸Skew & Revolutions - can't have 0.0 skew with revolutions
▸Taper, Taper Profile & Radius
▸Taper & Top Shear - top shear won't have an effect on some shapes if taper is b:1.0 ,e:1.0

parameter exploit

Exploitable parameters are achieved by changing the values with another shape selected first, one with greater limits on the parameter, then swapping to the exploitable shape.

example;
33 shapes have a taper limit of | 0.0, 2.0 |

spheres have a taper limit of | 0.0, 1.0 | but can be exploited to 2.0.
rez a Sphere
set the shape to 33->Circle and the taper to | x:2.0, y:2.0 |
set the shape back to Sphere.

the exploited tapering on Spheres is stable compared to 33->Shapes, and will only break if the taper itself is changed.

UV differences

shapes that are visually indistinguishable can have different UV maps.

ALSO, depending on the Hollow Shape selected, topology & UVs can change.
most practical application for this is with tapered cubes.

default / planar mapping modes can be changed under the Texture Tab.

Tube
default mapping

Cylinder
default mapping

Cube
Taper | x:1.0, y:1.0 |

default mapping
default mapping,
hollow with Hollow Shape changed from default
planar mapping

Test->Square
default mapping

Prism
Taper | x:1.0, y:-1.0 |

default mapping
default mapping,
hollow with Hollow Shape changed from default

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