Deferred Render Pipeline

Complete deferred render pipeline for panda3d (Work in progress)

Features:

Deferred rendering (obviously)

• Still allows some objects to have forward passes

Early-Z

• Pre-Renders depth to avoid overdraw

SSDO

• with one bounce for indirect lighting / color bleeding

PSSM, Cloud Shadows, Large Terrain Shadows

• complete lighting and shadows via compute shader
  • Too slow, replaced by regular fragment shaders

Atmospheric Scattering & Volumetric Fog

Multi-Hemisphere-Skybox

Lighting:

• Point Lights

  • Either shadow casting or not
  • When shadow casting, only use 2 perspectives
    • Parabolic mapping

• Directional Lights

  • Sun only
  • PSSM Shadows

• Ambient Lights

  • Darken or Bright
    • Artist controlled Global Illumination

• Projector Lights

  • Either shadow casting or not
  • Only 1 perspective
  • Projection texture
    • Can be used for flashlights for example

• Area Lights

  • Caster is a rectangle
    • Orthographic Lens
  • Also supports projection texture
  • Maybe Cone-Mapping

Physically based shading / lighting

Precomputed HDR environment probes

• Only in areas where reflective materials are used
  • and SSLR does not work well for the material
    • like water patches
• Image based lighting

Dynamic reflections

• Screen Space Local Reflections
• For specular materials
• Cheapest solution for reflections

Dynamic cubemaps

• rare usage, because of performance
• Render only 2 perspectives, parabolic mapping
• Not updated every frame

Tone mapping (HDR)

Blur

• Focal Blur
• Movement Blur (edges)
• Mipmap based + in place 4x4 kernel
  • Varying radius (DOF)

Tesselation Shader

• Based on displacement map, or detail normals
• Height stored in z component of normalmap

Bokeh DOF

• In combination with blur

Approximated Chromatic Aberration