Bump Map (bmpMp)

type: sCf(C)*

1. string: property.
2. texture source.
3. float : scale for height of bump map
4. zero or more texture modifiers; currently only txtrCdMA to scale and offset texture coordinates.

Description

A bump map. A lobe chunk to be used in an aggregate material. The bump map should be a height field. If the texture specified has multiple channels (e.g. a color image), the normal perturbation will be computed on the average of all channels.

Examples

nmdMtrl "Fabric-Blue Bumpy"
  lmbrtn
    rgb 0.1 0.2 0.5 end
  end
  bmpMp "vrtxUV"
    imgFl "FABRIC2.jpg" "jpg" end
  end
end