Blender Compositing

Overview

Build node-based compositing pipelines in Blender using Python. Set up render passes, add post-processing effects (blur, glare, color correction), combine layers, key green screens, and output final composited images — all scriptable from the terminal. Blender 5.0 reworked this API: the compositing tree is its own data-block (scene.compositing_node_group), the final image goes to a Group Output node, and almost every node option became an input socket.

Instructions

1. Create the compositing node group

import bpy

scene = bpy.context.scene
tree = bpy.data.node_groups.new("Final Comp", "CompositorNodeTree")
scene.compositing_node_group = tree
nodes, links = tree.nodes, tree.links