Fish School System

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This system allows you to easily animate thousands of swimming creatures.

  • Supported Target Platforms
  • Supported Engine Versions



The Fish Spline System allows you to quickly and easily animate hundreds of creatures with ease. It has a low impact on performance using instanced vertex animated meshes that dynamically move along procedurally generated splines.

Each instance will have its own spline procedurally generated from one main control spline. These generated splines will have a random offset for each point, and an offset from the origin; all based on the value of your choice.

With the 'Dynamic Speed' checkbox enabled, the fish will alternate between slow and fast speeds based on timers with random variables.

  • Choose how long you want your fish to swim slow and fast for.
  • Choose the speed at which they accelerate and decelerate
  • Choose the movement speeds, Animation Speeds, and Animation intensity

Choose the number of fish, the Scale & Size variation. Set the starting position along the spline and choose the distance between each instance. When working with hundreds of fish, you can simply check the "Spline Edit Mode" checkbox to hide all additional splines.

You can also easily replace the mesh and materials.

Automatically grab the meshes default materials, or use the 'Custom Materials' checkbox to pick your own.

Set the Desaturation, Hue shift & Random Hue Shift of each blueprint instance in order to distinguish each school.

Skeletal meshes aren't supported as they cause bad performance, but your animations can easily be converted to vertex animations using 3DS Max (See video description for tutorial).

Technical Details

NOTE: This package does not support Unreal 4.17 & 4.18 due to a bug in these engine versions.


Fish Model

  • Static Mesh (779 Triangles) with 3 LODs. (No Lightmap UV's due to Vertex Animation UV's)
  • 5 Textures
  • 6 Vertex Animation Textures
  • 2 Materials (Body & Fins)
  • 6 Material Instances


  • Customizable Mesh
  • Automatically grab Default Materials from mesh
  • Pick custom materials
  • Adjustable Hue Shift, Desaturation & Random Hue Shift of Blueprint materials
  • Set the amount of instances
  • Set the Scale & Scale variation of instances
  • Set the starting position of the school
  • Set the distance between each instance
  • Set the random offset of each generated spline's individual points
  • Set the random offset of each generated spline's world position
  • Toggle visibility of generated splines
  • Toggle Dynamic Speed
  • Adjustable acceleration and deceleration
  • Adjustable Fast / Slow movement speeds
  • Adjustable Fast / Slow movement swim lengths (in seconds)
  • Customizable Vertex animation intensity and speed


  • Caustic Light Function Material
  • Caustic Light Texture (2048x2048)
  • "Swimming Spectator" Pawn Blueprint
  • Demonstration Level

Number of Blueprints: 3

Number of Textures: 14

Input: Keyboard, Mouse

Supported Development Platforms: Windows

Supported Target Build Platforms: Windows, SteamVR, Oculus, PS4, XBox One, Gear VR

Documentation: In Blueprint



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