Global In/Out
Sets the frame range over which the node is active.
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Blobs
Organic procedural blob generator
Generates soft organic blobs with controls for count, radius, blobiness, seed, color and output quality.
This tool belongs to the Krokodove set integrated into DaVinci Resolve 21 and Fusion Studio 21. See the complete Krokodove node list and the comparison with native Fusion tools.
Blobs
DaVinci Resolve · Fusion
Blobs creates procedural liquid-like shapes for abstract backgrounds, masks, transitions and organic motion graphics.
Overview
What Blobs does
General Blobiness and radius controls establish the overall character, while Count and Random Seed determine population and variation.
Per-blob size and position controls let the organic field be art-directed rather than entirely random.
The generated shapes can be rendered visibly or repurposed as masks and control maps for other Fusion effects.
Mental model
Think of Blobs as a procedural field of soft drops: define the population and size range, then shape how lumpy or smooth the whole field feels.
Common uses
Liquid motion graphics
Organic masks
Abstract backgrounds
Transition mattes
Displacement sources
Flow anatomy
Inputs & outputs
The port structure shows how this node fits into a Fusion graph.
Generator node — no image input is required.
Blobs
Fusion node
Output
The processed result from this node.
Inspector
Important parameters
Start with these controls before reaching for more complicated workarounds.
Random Seed
Generates a different blob arrangement.
Levels Low / Levels High
Sets one boundary of the active range.
Gamma
Adjusts the midtone response without moving the black and white points equally.
General Blobiness
Sets the overall irregularity of blob contours.
General Radius
Sets the base scale.
Min Radius
Sets one boundary of the active range.
Max Radius
Sets one boundary of the active range.
Color
Sets the color.
Red / Green / Blue / Alpha
Provides separate controls for the red, green, blue and alpha channels.
Blobs / Count
Controls the number of blob elements.
Blob Position
Positions the selected blob on the X and Y axes.
Blob Size Type
Selects the Blob Size Type used by Blobs.
Blob Size
Sets the size of the selected blob independently of the others.
Blob Blobiness
Changes how rounded and merged the selected blob appears.
Render / Super-Sampling
Sets supersampling quality for cleaner rendered edges.
Higher values improve quality at additional render cost.
Image / Process Mode
Selects the processing mode.
Chooses how the node evaluates or combines the source data.
Image / Width
Sets the horizontal size.
Image / Height
Sets the vertical size.
Image / Pixel Aspect X/Y
Sets the pixel aspect ratio.
Image / Auto Resolution
Lets Fusion derive the working resolution automatically.
Disable it only when this node needs an explicit canvas size.
Source Color Space / Color Space Type
Sets the color Space Type.
Source Gamma Space / Curve Type
Selects the Curve Type used by Blobs.
Remove Curve
Removes the selected gamma or transfer curve so the source is treated in a linearized form.
Pre-Divide / Post-Multiply
Controls premultiplied-alpha handling around the operation.
Pre-divide removes alpha multiplication before processing; post-multiply restores it afterward. This is useful when color work creates dark or bright fringes around translucent edges.
Practical setup
A reliable workflow
- 1
Choose a useful blob count.
- 2
Set the radius range.
- 3
Adjust blobiness for organic shape.
- 4
Change Random Seed until the composition is useful.
- 5
Use downstream blur, threshold or color tools for the final look.
Typical node chain
Blob settings→
Blobs→
Organic field
Examples
Where this node fits in real work
Liquid matte
Turn blobs into a moving reveal map.
BlobsThresholdBitmapMerge
Organic glow background
Color and glow the procedural field.
BlobsColorMapGlowMerge
Troubleshooting
Common mistakes
Using too many blobs before choosing scale
Relying on seed changes instead of art-directing key elements
Applying very strong blur and losing all structure
Production notes
Practical tips
Use Levels and Threshold to turn soft blobs into sharper graphic shapes.
Animate seed sparingly; animating position or scale is usually more coherent.
Use blobs as data, not only as visible graphics.
Related nodes