Choosing PBR vs traditional textures is a decision about what each map is allowed to store. Physically based packs describe surface properties. Older diffuse-plus-specular packs often describe a finished picture under one light. Pick the wrong type and the same plank looks correct in one engine and muddy in the next.

What traditional workflows actually stored

A traditional material started with a diffuse map: the color you saw on screen. Artists often painted soft shadows, edge dirt, and a hint of reflection into it so the asset looked finished in a weak viewport. A specular map then placed highlights. Gloss was a separate guess. None of those values had to obey energy conservation, so the same crate could look plastic in one renderer and chalky in another.

That workflow was efficient when lights were fake and mobile GPUs were weak. The cost is portability. Change the HDRI or move from a game view to a path tracer and you start re-painting.

How PBR maps describe material, not lighting

PBR splits the job. Albedo holds only surface color. Roughness blurs or sharpens reflections. Metalness (or specular color in the older PBR variant) says whether the surface behaves like metal or like wood, paint, or stone. A normal map adds fine shape. Lighting is computed at render time, which is why one CC0 pack from Locker3d PBR textures can look consistent in Blender, Unreal, and Unity after you set color space correctly.

  • Albedo — color only; no shadows, baked AO, or highlights.
  • Roughness — white is matte, black is glossy.
  • Normal — grain, pores, and mortar without extra polygons.
  • Metalness — 0 for dielectrics, 1 for raw metal.

For map theory, read what PBR textures are and PBR textures for beginners.

When PBR is the clear choice

Use PBR whenever the camera, time of day, or engine might change. Archviz, product shots, games, and look-dev all benefit because you can relight without rebuilding the material. Modern tools expect it: Principled BSDF, Unreal’s default lit material, and Unity URP/HDRP all take metalness-roughness inputs. Browse wood, concrete, metal, and stone when you need those categories ready.

When a traditional or custom setup still wins

Keep a hand-painted or traditional look when style is the product. A toon shader, a locked product turntable, or a mobile title with baked lightmaps may not need a full PBR stack. Some legacy viewers still expose only diffuse and specular sliders. Stylized games sometimes bake a lighting suggestion into color on purpose so silhouettes read at a distance. That is art direction, not a physics failure—just do not drop that map into a PBR slot and expect photorealism.

How to migrate a legacy material to PBR

Treat the old diffuse as a suspect albedo. Flatten baked shadows, then build roughness from the old specular or gloss map (invert glossiness if needed). Add a normal map. Set metalness to 0 unless the object is actually metal. In Blender, follow how to apply PBR textures in Blender so color space does not undo the conversion.

  • Will this asset be relit or reused? Choose PBR.
  • Is the look stylized or locked to one light? A custom map can be faster.
  • Need commercial freedom? Locker3d packs are CC0.

For most new production, PBR is the default. Traditional maps remain a tool for style and legacy. More notes live on the Locker3d blog.

Frequently asked questions

Should every new 3D project use PBR textures?

For realistic work in Blender, Unreal, Unity, V-Ray, or Corona, yes. Use a traditional or custom look only for stylized art, a locked lighting setup, or a legacy engine that cannot read metalness and roughness.

Can I convert a painted diffuse map into a PBR albedo?

Not by renaming the file. Remove baked shadows, highlights, and ambient occlusion first, then add roughness and a normal map. Lighting left in the color map makes PBR materials look dirty or too dark.

Are Locker3d textures PBR or traditional?

Locker3d maps are physically based and released as CC0. You get albedo-style color plus roughness, normal, and metalness where needed, and you can use them commercially without attribution.