Simulation
Fireball
Fireball is a responsive simulated scene in BeamTracer Audio Visualizers, built on WebGPU. Settings, audio modulation, presets, and tips.
Fireball is a responsive simulated scene in the Simulation category. Open it from the left visualizer list, start an audio source, and use the settings panel to shape its response.
Open Fireball
Launch the visualizer with its matching left-nav entry selected.
Quick start
- Start the demo track, choose a local audio file, or enable a live input.
- Try a preset or style first, then open the section for the part of the image you want to change.
- On a control with Assign modulation, open the source picker, choose a signal, and watch the slider's live fill.
- Use Reset to Defaults whenever you want to return to the original look.
Presets and styles
Campfire · Inferno · Candle · Storm Front · Bass Bonfire · Ghost Fire · Violet Rush · Blue Propane · Smoke Signal · Strobe Core · Will-O-Wisp · Key Flame
Audio modulation
On a control with Assign modulation, select the activity icon to open Modulate with. Choose a named source, or choose — None to leave the control unmodulated. After you assign one, its name appears below the slider; select that name to edit the route, or use Clear modulation to remove it. The slider track shows the live signal reaching the control.
| Modulated control | Section | What the route changes |
|---|---|---|
| Temperature Rate | Combustion | Sets how quickly temperature changes or moves. |
| Density Rate | Combustion | Controls how concentrated the visible elements appear. |
| Fire Intensity | Combustion | Sets the visible fire intensity. |
| Turbulence | Flame Motion | Sets how irregular or unpredictable the turbulence appears. |
| Wind | Flame Motion | Controls how strongly wind moves the scene. |
| Bloom Strength | Bloom | Sets the visible bloom strength. |
| Key Light Hue | Lighting | Moves the color around the color spectrum. |
| Key Light X | Lighting | Moves the Key Light left or right of the fireball. |
| Key Light Y | Lighting | Moves the Key Light up or down relative to the fireball, so higher values light the smoke from higher above. |
| Key Light Z | Lighting | Moves the Key Light toward or away from the viewer, so negative values place it behind the fireball and positive values in front. |
| Fire Light On Smoke | Lighting | Sets how strongly the glow of the fire lights the surrounding smoke, so higher values make the smoke around the flames shine brighter. |
| Emitter X | Animation | Sets the left-to-right position of the point the fire comes from. |
| Emitter Y | Animation | Sets the height of the point the fire comes from, with higher values placing it higher in the view. |
| Emitter Z | Animation | Sets the depth of the point the fire comes from, moving it toward or away from the viewer. |
| Wander H | Animation | Sets how far the fire source drifts left and right on its own, so 0 keeps it fixed and higher values let it sway widely. |
| Wander V | Animation | Sets how far the fire source drifts up and down on its own, so 0 keeps it fixed and higher values let it bob widely. |
| Wander Z | Animation | Sets how far the fire source drifts toward and away from the viewer on its own, so 0 keeps it fixed and higher values let it move through more depth. |
Settings reference
Core
| Setting | Available values | What it changes |
|---|---|---|
| Simulation Speed | 0–2 | Sets how quickly simulation changes or moves. |
| Raymarch Steps | 4–42 | Sets how finely the fire and smoke volume is sampled when drawn, so higher values give smoother, more detailed clouds and lower values look coarser and banded. |
| Denoise | On / Off | Turns denoise on or off. |
| Denoise Strength | 0–1 | Sets the visible denoise strength. |
| Volume Resolution | 0.1–1 | Trades visual detail against performance. |
| Exposure | 0.1–2 | Sets the overall rendered brightness. |
| Key Clean | On / Off | Turns key clean on or off. |
Combustion
| Setting | Available values | What it changes |
|---|---|---|
| Temperature Rate | 0–8 | Sets how quickly temperature changes or moves. Use Assign modulation to choose a source. |
| Density Rate | 0–20 | Controls how concentrated the visible elements appear. Use Assign modulation to choose a source. |
| Fire Intensity | 0–80 | Sets the visible fire intensity. Use Assign modulation to choose a source. |
| Glow Spread | 1–5 | Controls how far elements separate from the center or from one another. |
| Fire Lifespan | 0.5s–10s | Sets how many seconds flames burn before they die out, so longer values give larger, longer-lasting fire. |
| Smoke Lifespan | 1s–100s | Sets how many seconds smoke lingers after the fire, so longer values leave thick smoke hanging around the flames. |
Flame Motion
| Setting | Available values | What it changes |
|---|---|---|
| Buoyancy | 0–10 | Sets how strongly the hot gas rises, so higher values make the fireball climb faster and stretch into a taller plume. |
| Turbulence | 0–5 | Sets how irregular or unpredictable the turbulence appears. Use Assign modulation to choose a source. |
| Turbulence Decay | 0–1 | Sets how long turbulence decay remains visible. |
| Turbulence Frequency | 1–10 | Sets the scale of the fireball turbulence pattern. |
| Velocity Damping | 0–2 | Balances immediate audio response against steadier motion. |
| Wind | 0–50 | Controls how strongly wind moves the scene. Use Assign modulation to choose a source. |
| Wind Direction | 0°–360° | Sets the direction in which the wind pushes the scene. |
| Phase Asymmetry | -0.99–0.99 | Sets which direction the fire and smoke scatter light, so positive values glow brightest when lit from behind and negative values glow brightest when lit from the viewer side. |
| Powder Effect | 0–1 | Sets how much the thin edges of the smoke darken for a crisper, puffier look, so higher values make clouds look more defined at their edges. |
Scattering & Shadow
| Setting | Available values | What it changes |
|---|---|---|
| Multi Scattering | 0–1 | Sets how much light bounces around inside dense smoke, so higher values brighten and soften the shaded core of the clouds. |
| Shadow Absorption | 0–10 | Sets how strongly the smoke blocks the Key Light, so higher values cast deeper shadows inside the clouds and lower values let light pass through. |
| Shadow Ambient | 0–1 | Controls the scene-wide fill light. |
Bloom
| Setting | Available values | What it changes |
|---|---|---|
| Bloom Strength | 0–3 | Sets the visible bloom strength. Use Assign modulation to choose a source. |
| Bloom Radius | 0–1 | Sets the visible bloom radius. |
| Bloom Threshold | 0–1 | Sets the level that must be crossed before bloom appears. |
Colors
| Setting | Available values | What it changes |
|---|---|---|
| Fire Hue Shift | 0°–360° | Moves the color around the color spectrum. |
| Saturation | 0–2 | Moves colors from muted toward vivid. |
Flame Colors
| Setting | Available values | What it changes |
|---|---|---|
| Fire Color Hot | Color | Sets the fire color hot. |
| Fire Color Mid | Color | Sets the fire color mid. |
| Fire Color Edge | Color | Sets the fire color edge. |
Lighting
| Setting | Available values | What it changes |
|---|---|---|
| Key Light | 0–1500 | Sets how bright the main light shining on the fire and smoke is, from off (0) to very bright. |
| Key Light Color | Color | Sets the key light color. |
| Key Light Hue | 0°–360° | Moves the color around the color spectrum. Use Assign modulation to choose a source. |
| Key Light X | -20–20 | Moves the Key Light left or right of the fireball. Use Assign modulation to choose a source. |
| Key Light Y | 2–30 | Moves the Key Light up or down relative to the fireball, so higher values light the smoke from higher above. Use Assign modulation to choose a source. |
| Key Light Z | -20–20 | Moves the Key Light toward or away from the viewer, so negative values place it behind the fireball and positive values in front. Use Assign modulation to choose a source. |
| Fire Light On Smoke | 0–2 | Sets how strongly the glow of the fire lights the surrounding smoke, so higher values make the smoke around the flames shine brighter. Use Assign modulation to choose a source. |
| Light Near Scale | 0–20 | Sets the visual light near scale. |
| Light Far Scale | 0–20 | Sets the visual light far scale. |
| Light Reflection | 0–20 | Controls how strongly the surrounding scene is reflected. |
Audio
| Setting | Available values | What it changes |
|---|---|---|
| Master Gain | 0x–5x | Sets how strongly the input signal affects master. |
| Bass Intensity | 0x–3x | Sets the visible bass intensity. |
| Mid Intensity | 0x–3x | Sets the visible mid intensity. |
| High Intensity | 0x–3x | Sets the visible high intensity. |
| Smoothing | 0.01–0.8 | Balances immediate audio response against steadier motion. |
Animation
| Setting | Available values | What it changes |
|---|---|---|
| Show Emitter Orb | On / Off | Shows or hides emitter orb. |
| Orb Emissive | 0–1 | Sets how brightly the emitter orb glows; only visible when Show Emitter Orb is on. |
| Movement Boost | 0–0.4 | Sets how strongly the input signal affects movement. |
| Movement Wind | 0–50 | Controls how strongly wind moves the scene. |
| Emitter X | 0.08–0.92 | Sets the left-to-right position of the point the fire comes from. Use Assign modulation to choose a source. |
| Emitter Y | 0.05–0.72 | Sets the height of the point the fire comes from, with higher values placing it higher in the view. Use Assign modulation to choose a source. |
| Emitter Z | 0.08–0.92 | Sets the depth of the point the fire comes from, moving it toward or away from the viewer. Use Assign modulation to choose a source. |
| Wander H | 0–0.35 | Sets how far the fire source drifts left and right on its own, so 0 keeps it fixed and higher values let it sway widely. Use Assign modulation to choose a source. |
| Wander V | 0–0.35 | Sets how far the fire source drifts up and down on its own, so 0 keeps it fixed and higher values let it bob widely. Use Assign modulation to choose a source. |
| Wander Z | 0–0.35 | Sets how far the fire source drifts toward and away from the viewer on its own, so 0 keeps it fixed and higher values let it move through more depth. Use Assign modulation to choose a source. |
| Wander Speed | 0–3 | Sets how quickly wander changes or moves. |
| Meander | On / Off | Turns meander on or off. |
| Meander Speed | 0–3 | Sets how quickly meander changes or moves. |
Camera
| Setting | Available values | What it changes |
|---|---|---|
| Camera Rotation | On / Off | Turns camera rotation on or off. |
| Rotation Speed | -1–1 | Sets how quickly rotation changes or moves. |
| Camera Distance | 0.35–3 | Sets how far the camera sits from the subject. |
Some controls appear only after you enable a related mode or style. The settings panel always reflects the options available for the current selection.
Tips for a better audio visualization
- Start with moderate audio strength. Large gain changes can overwhelm the motion before you can see what each band contributes.
- Try assigning Bass to Temperature Rate, then compare Mid, High, and Volume while the demo track plays. The slider's live fill shows the signal reaching that control.