Surface ID Mask

What is it for?

• Processing only metal, stone, walls, or another selected part
• Creating a height or emission map for Surface Set Map only at a particular ID
• Creating a mask for Surface Composite or image filters

Overview

Extracts only areas with a specified material or face ID as a white mask from a Surface. It enables part-specific processing such as metal only or the left wall without manually drawing a mask.

Usage tips

• This highlights the strength of the Surface workflow. If material IDs are assigned during solid_render, any part can be extracted later, automating selections.
• The extracted mask is a regular Image. Use it as a filter mask, to limit a map for surface_set_map, or in combinations built with mask_boolean.
• An absent ID produces a black image. Inspect material_mask or face_mask from surface_unpack first to see which IDs are present.

Related nodes

• surface_assign_id / surface_assign_material — paint IDs

• surface_unpack — visually inspects the ID distribution

• mask_boolean — combines extracted masks

• surface_set_map — uses masks in map processing

• Version: 1

Examples

[Surface] → surface → [Surface ID Mask(id_kind:Material, material_id:core:metal)] → mask

The output is white only over metal. Use it to build a map for Surface Set Map or as a mask for a regular image filter.