Simulation
Fluid Simulation
Fluid Simulation is a responsive simulated scene in BeamTracer Audio Visualizers, built on WebGL. Settings, audio modulation, presets, and tips.
Fluid Simulation 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 Fluid Simulation
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
Splash · Spectrum · Corona · Vortex · Stereo · Neon
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 |
|---|---|---|
| Splat Radius | Core | Sets the visible splat radius. |
| Splat Force | Core | Sets how hard each splat shoves the fluid when it is added, so higher values throw dye farther and faster. |
| Density Dissipation | Fluid Physics | Controls how concentrated the visible elements appear. |
| Velocity Dissipation | Fluid Physics | Sets how quickly fluid motion slows to a stop; higher values make swirls die out sooner, while lower values let currents keep flowing. |
| Vorticity | Fluid Physics | Controls the strength of the swirling motion. |
| Bloom Strength | Bloom | Sets the visible bloom strength. |
| Background Hue Speed | Colors | Sets how quickly background hue changes or moves. |
Settings reference
Core
| Setting | Available values | What it changes |
|---|---|---|
| Sim Resolution | 32–256 | Trades visual detail against performance. |
| Dye Resolution | 128–1024 | Trades visual detail against performance. |
| Pressure Iterations | 1–50 | Trades visual detail against performance. |
| Splat Radius | 0.01–1 | Sets the visible splat radius. Use Assign modulation to choose a source. |
| Splat Force | 1000–10000 | Sets how hard each splat shoves the fluid when it is added, so higher values throw dye farther and faster. Use Assign modulation to choose a source. |
Material
| Setting | Available values | What it changes |
|---|---|---|
| Shading | On / Off | Turns shading on or off. |
| Background Opacity | 0–1 | Sets how solid the background behind the fluid is. At 1 the fluid sits on its background color; at 0 only the fluid remains over whatever is behind the visualizer. |
Fluid Physics
| Setting | Available values | What it changes |
|---|---|---|
| Density Dissipation | 0–4 | Controls how concentrated the visible elements appear. Use Assign modulation to choose a source. |
| Velocity Dissipation | 0–4 | Sets how quickly fluid motion slows to a stop; higher values make swirls die out sooner, while lower values let currents keep flowing. Use Assign modulation to choose a source. |
| Pressure | 0–1 | Controls how strongly the simulation pushes outward. |
| Vorticity | 0–50 | Controls the strength of the swirling motion. Use Assign modulation to choose a source. |
Bloom
| Setting | Available values | What it changes |
|---|---|---|
| Bloom | On / Off | Turns bloom on or off. |
| Bloom Strength | 0.1–2 | Sets the visible bloom strength. Use Assign modulation to choose a source. |
| Bloom Threshold | 0–1 | Sets the level that must be crossed before bloom appears. |
| Bloom Soft Knee | 0–1 | Sets the visible strength of bloom soft knee. |
| Bloom Iterations | 1–10 | Trades visual detail against performance. |
| Bloom Resolution | 64–512 | Trades visual detail against performance. |
Sunrays
| Setting | Available values | What it changes |
|---|---|---|
| Sunrays | On / Off | Turns sunrays on or off. |
| Sunrays Weight | 0.3–1 | Sets how bright and strong the light rays radiating from the fluid appear; available when Sunrays is on. |
| Sunrays Resolution | 64–512 | Trades visual detail against performance. |
Colors
| Setting | Available values | What it changes |
|---|---|---|
| Rainbow Colors | On / Off | Turns rainbow colors on or off. |
| Hue Animation Speed | 1–20 | Sets how quickly hue animation changes or moves. |
| Background Hue Animation | On / Off | Turns background hue animation on or off. |
| Background Hue Speed | 0.1–5 | Sets how quickly background hue changes or moves. Use Assign modulation to choose a source. |
| Background Color | Color | Sets the background color. |
Audio
| Setting | Available values | What it changes |
|---|---|---|
| Master Gain | 0–3 | Sets how strongly the input signal affects master. |
| Bass Intensity | 0–3 | Sets the visible bass intensity. |
| Mid Intensity | 0–3 | Sets the visible mid intensity. |
| High Intensity | 0–3 | Sets the visible high intensity. |
| Audio Splats | On / Off | Turns audio splats on or off. |
Spectrum Injection
| Setting | Available values | What it changes |
|---|---|---|
| Spectrum Mode | On / Off | Turns spectrum mode on or off. |
| Spectrum Bars | 16–128 | Sets how many separate bars across the screen each push the fluid, one per slice of the music spectrum; available when Spectrum Mode is on. |
| Spectrum Force | 0.5–3 | Sets how hard each spectrum bar shoves the fluid, so louder frequencies make bigger swirls; available when Spectrum Mode is on. |
| Spectrum Position | TOP, BOTTOM, CENTER, MIRROR | Chooses the spectrum position mode or style. |
| Mirror Angle | 0°–360° | Sets the mirror angle of the visible composition. |
| Spectrum Smooth | 0–0.95 | Sets how much each spectrum bar blends with its previous level, so higher values give calmer, slower-moving pushes and lower values react sharply; available when Spectrum Mode is on. |
| Spectrum Dye | On / Off | Turns spectrum dye on or off. |
Circular Injection
| Setting | Available values | What it changes |
|---|---|---|
| Circular Spectrum | On / Off | Turns circular spectrum on or off. |
| Circular Radius | 0.1–0.5 | Sets the visible circular radius. |
| Circular Force | 0.5–3 | Sets how hard the ring of spectrum points pushes the fluid outward from the center, with louder frequencies pushing further; available when Circular Spectrum is on. |
| Circular Rotation | 0°–360° | Sets the circular rotation of the visible composition. |
Stereo
| Setting | Available values | What it changes |
|---|---|---|
| Stereo Mode | On / Off | Turns stereo mode on or off. |
| Stereo Sep | 0–2 | Sets how strongly the left and right edges push the fluid toward the center, so higher values create bolder side-to-side motion; available when Stereo Mode is on. |
| Stereo Intensity | 0–3 | Sets the visible stereo intensity. |
Beat Bloom
| Setting | Available values | What it changes |
|---|---|---|
| Beat Bloom | On / Off | Turns beat bloom on or off. |
| Beat Bloom Int | 0–2 | Sets the visible strength of beat bloom int. |
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 Splat Radius, then compare Mid, High, and Volume while the demo track plays. The slider's live fill shows the signal reaching that control.