Bake High to Low

Trigger

Use this skill when the user:

• Wants a tangent-space normal map from a dense source onto a game-resolution mesh
• Mentions cage bake, use_selected_to_active, cage_extrusion, or bpy.ops.object.bake
• Has an LOD from DECIMATE COLLAPSE (or a retopo) and needs the missing surface detail in a map
• Is about to call bake from EEVEE, on GPU in CI, or with bake_type=

This skill is the bake step. It composes ai-mesh-cleanup (identity scale, applied transforms, a UV layer that already exists) and the LOD contract in examples/lod-decimate-chain/ / snippets/decimate_to_budget.py (collapse onto a budget; UVs survive well enough to bake). It does not unwrap, transfer UVs, or pack an atlas — those are a later phase. It does not generate meshes.

The core misunderstanding

Baking is not a render. EEVEE has no bake path. The operator writes into the active Image Texture node of the active object's material, not into a file and not into "the selected image datablock." A missing UV layer, the wrong object active, or a node that is not nodes.active finishes without error and leaves a blank or unchanged image.

The pass type RNA is type, not bake_type. bake_type is not on bpy.ops.object.bake. Passing it is a TypeError.