PBR Maps from TMAC
TMAC Original Scan
Getting TMAC Scan is a big moment. Let´s see what is inside
Scan.zip
Take a look at Samples to Download
TMAC uses cross polarized photommetry coupled with custom software to process maps to dissolve surface into maps which each one represents different visual property of the sample.
8-Directional Normal
TMAC uses eight directional photommetry to derive crisp normal map of the surface. Normal map represents surface relief or bumpiness of the sample.
Albedo
With cross polarization it is possible to derive a map that has no perceived light and reflections. Albedo represents non-lit color of the sample ready to be lit up again in virtual space.
Metalness
Materials in real world fall into categories of metals and insulators. Metals tend to have more prominent specular reflection whereas insulators have less prominent reflection. Metalness describes which part of the sample is metal and which is insulator.
Translucency
Translucency is how light travels trough the surface. In other words it is underlighting.
Alpha
Many surfaces are not fully solid. They have smaller or bigger air gaps. These holes are represented in alpha map by black color and solid parts by white color.
Roughness
Roughness map defines what part of the object is fully shiny - like mirror - and which parts are matte. Current TMAC has sparse rapid sampling of roughness and provided roughness map is generally correct. There are limitations with super planar and perfectly flat surfaces.
Pseudo Height
Although relief of the surface is represented in normal map, there is no notion of depth. Height map defines distance from camera and is used to represent more severe reliefs of surfaces. TMAC does not have notion of this distance thus map is estimated from normal map and shall be considered pseudo.
Technical Specification
- sRGB
- 16-Bit PNG
- 8K+*
- Embedded DPI
Images are in sRGB space. Saved in 8-bit
PNG format. Displacement map is 16-bit PNG.
*Textures are captures in resolution based on used flagship camera. High resolutions available.
All images have embedded DPI which is used to store real world size of the surface.
Embedded DPI
Limitations
TMAC is not scientific color measurement device and shall not be thought about as such. TMAC is a texture capture device helping CGI studios and digital professionals bridge the gap between acquiring surface texture till material authoring.
TMAC does not produce Digital Twins or exact replicas of the surface. It produces textures that further on need to be authored for specific software to look as close to real surface if desired.
Same surface rescanned can be rendered slightly differently based on how samples are inserted in the device and based on different zoom levels.
TMAC is calibrated and has been refined to provide such textures that reduce time for material authoring.
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Q: Does tmac scan anisotropy?
A: tmac does not specifically scan anisotropy however captured maps can be usually well used to replicate anisotropy. Normal map does include anisotropy by its nature too.
Compatible Software
Maps are general and can be used in almost any 3DCC application. Here are some popular applications.