Source: Roblox Creator Hub · CC BY 4.0 · View source · Code samples: MIT Imported 2026-10-03. Formatting adapted for this site.
Smoke
Inherits from: Instance → Object
Smoke is one of several particle-emitting classes. Like other particle emitters of its kind, Smoke objects emit particles when parented to a BasePart (such as a Part) or an Attachment within such a BasePart. Compared to the ParticleEmitter class, Smoke lacks many different customization properties and special methods, such as ParticleEmitter.Lifetime or ParticleEmitter:Emit(). It is useful to create a quick special effect in a pinch; for more detailed work it is preferable to use a ParticleEmitter instead.
When Smoke.Enabled is toggled off, particles emit by this object will continue to render until their lifetime expires. When a Smoke object's Instance.Parent is set to nil (and/or Instance:Destroy()ed), all particles will instantly disappear. If this effect is not desired, try hiding the parent object at a far away position, then removing the Smoke after a few seconds using Debris to give the last particles a chance to expire. This object does not have a ParticleEmitter:Clear() method, but it is possible to set the Instance.Parent to nil and back to the exact same object for the same effect.
Smoke particles are only emitted from the center of BasePart to which they are parented. Parenting a Smoke object to an Attachment instead allows customization of the particles' start position.
Inherits from: Instance
Memory category: Instances
Code samples: View on Creator Hub (Add-Smoke-to-Fire).
Properties
| Name | Type / Returns | Description |
|---|---|---|
| Smoke.Color | Color3 | Determines the color of the smoke particles. |
| Smoke.Enabled | boolean | Determines whether smoke particles emit. |
| Smoke.Opacity | float | Determines how opaque smoke particles render. |
| Smoke.RiseVelocity | float | Determines the velocity of the smoke particles. |
| Smoke.Size | float | Determines the size of newly emit smoke particles. |
| Smoke.TimeScale | float | Value between 0-1 that controls the speed of the particle effect. |
Inherited from Instance
| Name | Type / Returns | Description |
|---|---|---|
| Instance.Archivable | boolean | Determines if an Instance and its descendants can be cloned using Instance:Clone(), and can be saved/published. |
| Instance.archivable | boolean | |
| Instance.Capabilities | SecurityCapabilities | The set of capabilities allowed to be used for scripts inside this container. |
| Instance.IsInSandbox | boolean | Indicates whether the instance is inside a sandboxed container. |
| Instance.Name | string | A non-unique identifier of the Instance. |
| Instance.Parent | Instance | Determines the hierarchical parent of the Instance. |
| Instance.PredictionMode | PredictionMode | Reflects the client-side prediction mode applied to the instance under server-authoritative physics. |
| Instance.RobloxLocked | boolean | A deprecated property that used to protect CoreGui objects. |
| Instance.Sandboxed | boolean | When enabled, the instance can only access abilities in its Capabilities list. |
| Instance.UniqueId | UniqueId | A unique identifier for the instance. |
Inherited from Object
| Name | Type / Returns | Description |
|---|---|---|
| Object.ClassName | string | A read-only string representing the class this Object belongs to. |
| Object.className | string |
Smoke.Color
The Color property determines the color of all the particles emit by a Smoke object (both existing and future particles). It behaves similarly to ParticleEmitter.Color, except that it is only one color and not a ColorSequence. A color of white with some Smoke.Opacity makes for a nice fog effect, and a very opaque black color can compliment a Fire object nicely.
| Field | Value |
|---|---|
| type | Color3 |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Data |
| serialization | {"can_load":true,"can_save":true} |
| capabilities | ["Basic"] |
Code samples: View on Creator Hub (Add-Smoke-to-Fire).
Smoke.Enabled
The Enabled property, much like ParticleEmitter.Enabled, determines whether smoke particles are emitted. Any particles already emit will continue to render until their lifetime expires. This property is useful for keeping pre-made smoke effects off until they are needed later. Since smoke particles are destroyed when the Smoke object's Instance.Parent is set to nil, this property is useful in allowing existing particles the opportunity to expire before destroying the Fire object altogether. See the function below.
| Field | Value |
|---|---|
| type | boolean |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Data |
| serialization | {"can_load":true,"can_save":true} |
| capabilities | ["Basic"] |
Code samples: View on Creator Hub (Add-Smoke-to-Fire, Smoke-Enabled).
Smoke.Opacity
Opacity determines the opaqueness of the smoke particles. It must be in the range [0, 1]. This property works inversely in comparison to a part's BasePart.Transparency or ParticleEmitter's ParticleEmitter.Transparency: a value of 0 is completely invisible, 1 is completely visible.
The texture that Roblox uses for Smoke particles is partially transparent, so setting this property to 1 still yields transparency in rendered smoke.
| Field | Value |
|---|---|
| type | float |
| tags | ["NotReplicated"] |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Data |
| serialization | {"can_load":true,"can_save":false} |
| capabilities | ["Basic"] |
Code samples: View on Creator Hub (Add-Smoke-to-Fire).
Smoke.RiseVelocity
RiseVelocity behaves similarly to ParticleEmitter.Speed and Fire.Heat: it determines how fast the smoke particles move during their lifetime. It must be in the range [-25, 25]. Negative values will cause particles to emit in the bottom (-Y) direction of the parent BasePart.
When using a Smoke effect to create fog, set this property to 0. For large smoke effects, make the rise subtle (2 to 8). For chimneys and smokestacks, higher values are appropriate.
| Field | Value |
|---|---|
| type | float |
| tags | ["NotReplicated"] |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Data |
| serialization | {"can_load":true,"can_save":false} |
| capabilities | ["Basic"] |
Code samples: View on Creator Hub (Add-Smoke-to-Fire).
Smoke.Size
The Size property of Smoke determines the size of the newly emit smoke particles. Unlike Smoke.Color, this property will not change the size of existing particles. It must be in the range [0.1, 100]. Unlike ParticleEmitter.Size, this property is only a number (not a NumberSequence). Also note also that the size of the particles is not 1-to-1 with studs; in fact, the size of the smoke particle is more than twice as large. At the largest size, smoke particles can render larger than 200 studs wide!
| Field | Value |
|---|---|
| type | float |
| tags | ["NotReplicated"] |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Data |
| serialization | {"can_load":true,"can_save":false} |
| capabilities | ["Basic"] |
Code samples: View on Creator Hub (Add-Smoke-to-Fire).
Smoke.TimeScale
A value between 0-1 than controls the speed of the particle effect. At 1 it runs at normal speed, at 0.5 it runs at half speed, and at 0 it freezes time.
| Field | Value |
|---|---|
| type | float |
| security | {"read":"None","write":"None"} |
| thread safety | ReadSafe |
| category | Data |
| serialization | {"can_load":true,"can_save":true} |
| capabilities | ["Basic"] |
Methods
Inherited from Instance
| Name | Type / Returns | Description |
|---|---|---|
| Instance:AddTag | () | Applies a tag to the instance. |
| Instance:children | Instances | Returns an array of the object's children. |
| Instance:ClearAllChildren | () | This method destroys all of an instance's children. |
| Instance:Clone | Instance | Create a copy of an instance and all its descendants, ignoring instances that are not Archivable. |
| Instance:clone | Instance | |
| Instance:Destroy | () | Sets the Instance.Parent property to nil, locks the Instance.Parent property, disconnects all connections, and calls Destroy() on all children. |
| Instance:destroy | () | |
| Instance:FindFirstAncestor | Instance? | Returns the first ancestor of the Instance whose Instance.Name is equal to the given name. |
| Instance:FindFirstAncestorOfClass | Instance? | Returns the first ancestor of the Instance whose Object.ClassName is equal to the given className. |
| Instance:FindFirstAncestorWhichIsA | Instance? | Returns the first ancestor of the Instance for whom Object:IsA() returns true for the given className. |
| Instance:FindFirstChild | Instance? | Returns the first child of the Instance found with the given name. |
| Instance:findFirstChild | Instance | |
| Instance:FindFirstChildOfClass | Instance? | Returns the first child of the Instance whose ClassName is equal to the given class name. |
| Instance:FindFirstChildWhichIsA | Instance? | Returns the first child of the Instance for whom Object:IsA() returns true for the given className. |
| Instance:FindFirstDescendant | Instance? | Returns the first descendant found with the given Instance.Name. |
| Instance:GetActor | Actor? | Returns the Actor associated with the Instance, if any. |
| Instance:GetAttribute | Variant | Returns the value which has been assigned to the given attribute name. |
| Instance:GetAttributeChangedSignal | RBXScriptSignal | Returns an event that fires when the given attribute changes. |
| Instance:GetAttributes | Dictionary | Returns a dictionary of the instance's attributes. |
| Instance:GetChildren | Instances | Returns an array containing all of the instance's children. |
| Instance:getChildren | Instances | |
| Instance:GetDebugId | string | Returns a coded string of the debug ID used internally by Roblox. |
| Instance:GetDescendants | Instances | Returns an array containing all of the descendants of the instance. |
| Instance:GetFullName | string | Returns a string describing the instance's ancestry. |
| Instance:GetStyled | Variant | Returns the styled or explicitly modified value of the specified property, or else the default property value if it hasn't been styled/modified. |
| Instance:GetStyledPropertyChangedSignal | RBXScriptSignal | Returns an event that fires when the given style property changes on the instance. |
| Instance:GetTags | Array | Gets an array of all tags applied to the instance. |
| Instance:HasTag | boolean | Check whether the instance has a given tag. |
| Instance:IsAncestorOf | boolean | Returns true if an Instance is an ancestor of the given descendant. |
| Instance:IsDescendantOf | boolean | Returns true if an Instance is a descendant of the given ancestor. |
| Instance:isDescendantOf | boolean | |
| Instance:IsPropertyModified | boolean | Returns true if the value stored in the specified property is not equal to the code-instantiated default. |
| Instance:QueryDescendants | Instances | Returns an array containing all descendants of the instance that match the selector string. |
| Instance:Remove | () | Sets the object's Parent to nil, and does the same for all its descendants. |
| Instance:remove | () | |
| Instance:RemoveTag | () | Removes a tag from the instance. |
| Instance:ResetPropertyToDefault | () | Resets a property to its default value. |
| Instance:SetAttribute | () | Sets the attribute with the given name to the given value. |
| Instance:WaitForChild | Instance | Returns the child of the Instance with the given name. If the child does not exist, it will yield the current thread until it does. |
Inherited from Object
| Name | Type / Returns | Description |
|---|---|---|
| Object:GetPropertyChangedSignal | RBXScriptSignal | Get an event that fires when a given property of the object changes. |
| Object:IsA | boolean | Returns true if an object's class matches or inherits from a given class. |
| Object:isA | boolean |
Events
Inherited from Instance
| Name | Type / Returns | Description |
|---|---|---|
| Instance.AncestryChanged | Fires when the Instance.Parent property of this object or one of its ancestors is changed. | |
| Instance.AttributeChanged | Fires whenever an attribute is changed on the Instance. | |
| Instance.ChildAdded | Fires after an object is parented to this Instance. | |
| Instance.childAdded | ||
| Instance.ChildRemoved | Fires after a child is removed from this Instance. | |
| Instance.DescendantAdded | Fires after a descendant is added to the Instance. | |
| Instance.DescendantRemoving | Fires immediately before a descendant of the Instance is removed. | |
| Instance.Destroying | Fires immediately before (or is deferred until after) the instance is destroyed via Instance:Destroy(). | |
| Instance.StyledPropertiesChanged | Fires whenever any style property is changed on the instance, including when a property is set to nil. |
Inherited from Object
| Name | Type / Returns | Description |
|---|---|---|
| Object.Changed | Fires immediately after a property of the object changes, with some limitations. |