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A simple, lightweight PBR render pipeline for Panda3D

Project description

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This is a simple, basic, lightweight, no-frills PBR render pipeline for Panda3D. It is currently intended to be used with panda3d-gltf, which will output textures in the right order. The PBR shader is heavily inspired by the Khronos glTF Sample Viewer. Note: this project does not make an attempt to match a reference renderer.


  • Supports running on potatoes with an easy OpenGL 2.1+ requirement
  • Forward rendered metal-rough PBR
  • All Panda3D light types except ambient (point, directional, and spot)
  • Filmic tonemapping

Notable Todos

There are a few big things still missing and are planned to be implemented:

  • Normals
  • Shadow mapping
  • Environment maps

Other missing features

The goal is to keep this simple and lightweight. As such, the following missing features are not currently on the roadmap:

  • Something to deal with many lights (e.g., deferred, forward+, tiling, clustering, etc.)
  • Fancy post-process effects (temporal anti-aliasing, ambient occlusion, screen-space reflections)
  • Environment probes


Use pip to install the panda3d-simplepbr package:

pip install panda3d-simplepbr

To grab the latest development build, use:

pip install git+


Just add simplepbr.init() to your ShowBase instance:

from direct.showbase.ShowBase import ShowBase

import simplepbr

class App(ShowBase):
    def __init__(self):


The init() function will choose typical defaults, but the following can be modified via keyword arguments:

render_node : The node to attach the shader too, defaults to base.render if None window : The window to attach the framebuffer too, defaults to if None camera_node : The NodePath of the camera to use when rendering the scene, defaults to if None


The shader currently assumes that the following textures are in these slots:

  1. BaseColor
  2. MetalRoughness
  3. Normals (not currently supported)


For an example application using panda3d-simplepbr check out the viewer in the panda3d-gltf repo.

Running tests

python test


B3D 3-Clause

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