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Version: 0.10.0

UeRendererDeferred

UeRendererDeferred is an alternative renderer that implements a Deferred Shading pipeline. Unlike the standard UeRenderer (which uses Forward Shading), it separates the geometry processing from the lighting calculations.

⚠️ EXPERIMENTAL: This renderer is currently in beta. Features like light volumes and advanced transparent sorting are still being refined.

Advantages of Deferred Rendering​

  • Large Number of Lights: You can have dozens or even hundreds of dynamic lights with minimal performance impact compared to Forward Shading.
  • Simplified Shaders: Geometry shaders don't need to handle lighting complexity, and lighting shaders don't need to handle complex geometry.
  • Screen-Space Effects: Easier integration of effects like SSAO, SSR, or screen-space reflections since depth and normals are already available in the G-Buffer.

Constructor​

new UeRendererDeferred(data = {})

Parameters​

Inherits all parameters from UeRenderer.

Methods​

MethodReturnsDescription
setSize(width, height)voidResizes the renderer and its internal G-Buffer surfaces.
render(scene, camera)selfPerforms the two-pass deferred rendering process.

🧠 Technical Notes​

  • G-Buffer: This renderer uses multiple render targets (MRTs) to store:
    • Buffer 0: Albedo (RGB) and Alpha (A).
    • Buffer 1: Normals (RGB, 16-bit float) and Metalness (A).
    • Buffer 2: Roughness (R), AO (G).
    • Buffer 3: Emissive (RGB).
  • Forward Pass: Transparent objects are still rendered using a Forward pass after the lighting pass is completed, using the depth buffer from the G-Buffer pass for correct occlusion.
  • Hardware Support: Requires GPU support for Multiple Render Targets (MRT), which is standard on most modern desktop and mobile hardware.
  • Lighting Shader: Lighting is currently calculated in a single full-screen pass using sh_ue_deferred_lighting.