Static actors' optical flow may be estimated incorrectly. UsabilityĬurrently this plugin correctly displays optical flow data for movable and stationary UE4 actors, based on velocity frame buffer (also used by engine for motion blur). It has two parameters: VelocityBufferCoefficient and StaticObjectCoefficient, which control how quickly movement saturates colors for stationary/movable and static objects respectively. To apply the patch, simply put OptiFlowUE4.patch into the root directory of the engine and run patch -p1 UE4.patch.Īfter compiling UE4, use it to create a new project or open an existing one, and then copy OptiFlow directory into Plugins directory (you may need to create it in the root of the project).Īfter that, you can use OptiFlow/Content/PostProcess/VelocityMaterial.uasset as a post process material.

You would need to get UE4 source code, apply OptiFlowUE4.patch and then compile the engine. UsageĬurrently this plugin requires a patched custom-built Unreal Engine 4. It is based on ProfFan's optical flow demo. This plugin provides the means to extract optical flow data from Unreal Engine.

Optical glow plugin