FIT1033 Chap.7 Substance Painter Materials
Substance Painter Materials
Substance Painter turns a cleaned and unwrapped mesh into a layered material description. The workflow begins with a correct project and inspected mesh-map bake, then establishes broad material identity through base colour, roughness and metallic response. Geometry masks and paint effects isolate regions, clone work removes visible seams, height adds selective relief, and named export channels reconstruct the surface in Unity.
Detail must follow use and exposure rather than random noise.
What this chapter covers
- 01
Project setup and normal format
- 02
Mesh-map baking and error inspection
- 03
Base colour, roughness and metallic
- 04
Geometry masks and paint effects
- 05
Clone cleanup and height detail
- 06
Channel export and Unity connection
Worked example · free
Weathered radio across four channels
- 1Bake maps and repair projection errors before building the layer stack.
- 1Set broad material identities for casing, rubber and exposed metal.
- 1Mask the regions and correct leaks across UV or geometry boundaries.
- 1Add contact wear and recess grime, then verify the exported channels in Unity.
Key terms
- Mesh Map
- Baked geometric information used by generators, smart materials and texture effects.
- Geometry Mask
- A mask that isolates texture effects by selected mesh regions or identifiers.
- Roughness
- The channel controlling how broad or sharp the reflected highlight appears.
- Metallic
- The channel describing whether the surface follows metal or non-metal light response.
Substance Painter Materials FAQ
Why should I bake mesh maps before using smart materials?
Smart materials and generators often depend on geometric information such as curvature and ambient occlusion. A bad bake can place wear or shadows in the wrong location. Inspect the bake first, especially around close surfaces and seams, so later layers respond to reliable information rather than magnifying an early error.
Why does a material look wrong when the colour matches?
Material identity depends on more than base colour. Roughness changes highlight spread, metallic changes the reflection model, and normal or height carries surface variation. Inspect those channels together under useful lighting. A correct colour with an overly tight highlight can make painted metal read as wet plastic.
How much dirt and wear should I add?
Use the reference and the object's likely history. Recesses collect grime, exposed edges receive contact wear, and protected areas remain quieter. Uniform procedural noise may look detailed but does not explain the surface. The practical brief asks whether the result represents the reference characteristics, so variation should remain accountable.
Assessment move
Build a small material library from your own references. For each surface, record its base colour family, roughness behaviour, metallic status, normal detail and likely wear locations. Recreate one material with a minimal layer stack, then import it into Unity and compare the destination response rather than judging Painter alone. Analyse references by channel before opening Painter.
Separate what belongs to base colour from what is really a roughness change, a metallic boundary or small normal and height relief. A dark patch is not automatically a dark pigment; it may be a reflection on a smoother region. Record the surrounding use, exposure and contact points as well. These notes give later generators and masks a physical reason instead of allowing procedural noise to make every surface equally busy.
Begin the project with verification. Confirm the intended texture set, inspect the imported mesh and material divisions, then bake the required mesh maps. Rotate the asset under neutral lighting and look for projection errors, dark gradients or mismatched seams before building the layer stack. If the bake is wrong, correct the mesh, cage or settings and rebake.
Painting over a broken map can hide a symptom in one view while corrupting curvature-driven masks everywhere else. Construct each material from broad response to fine evidence. Establish base colour family, roughness range and metallic status first. Use clear layer names and isolate regions with geometry or painted masks.
Add wear only after the clean material reads, and place it near handles, exposed edges, recesses or assembly boundaries supported by the reference. Vary intensity and scale; identical scratches across metal, rubber and paint erase the distinction those materials should communicate. Practise seam repair on a duplicate texture set.
Place a visible mark across a UV boundary, inspect it in three dimensions and use clone or paint tools to restore continuity. Then reduce or remove the repair layer to verify that it addresses the seam rather than merely covering a larger area. Repeat at a different resolution to see which details survive. This teaches you to judge the final image scale instead of working indefinitely at close zoom.
Export early to Unity with a named preset or an explicit channel checklist. Reconnect base colour, metallic, roughness or smoothness, normal and emissive information according to the destination shader, then compare neutral renders from both applications. A material is not finished because it looks convincing in Painter alone. Log any inversion, colour-space or normal-import correction so the next export is reproducible.
For timed preparation, build one reference-supported surface with the smallest layer stack that can express it. Protect time for bake inspection, broad materials, one purposeful wear pass and destination verification. Save the Painter project as evidence before the deadline. If detail time runs out, a coherent clean surface with correct channel behaviour is stronger than dense random marks on an incomplete or unverified file.
