3
$\begingroup$

Here are my settings:

enter image description here

Export settings:

enter image description here

In '.mtl'

newmtl c0
Ns 19.607843
Ka 0.000000 0.000000 0.000000
Kd 0.000000 0.077046 0.638270
Ks 0.882353 0.882353 0.882353
Ni 1.000000
d 1.000000
illum 2
$\endgroup$
6
  • $\begingroup$ I don't think that Ambient Cooefficient is supported by .mtl. There's more info on .mtl files here: web.archive.org/web/20080813073052/http://local.wasp.uwa.edu.au/… $\endgroup$
    – CharlesL
    Commented Nov 28, 2013 at 18:51
  • $\begingroup$ It would help if we knew what you were trying to do and what you expect the Ambient value to be. This Ambient value is related to the render engine and doesn't really have anything to do with the material as it could be used outside Blender. $\endgroup$
    – Greg Zaal
    Commented Nov 28, 2013 at 18:51
  • $\begingroup$ Related, Export Wavefront .mtl file — Where is the reflectance coefficient?. $\endgroup$
    – iKlsR
    Commented Nov 28, 2013 at 18:55
  • $\begingroup$ Basically you can see Specular which is 'white' is the value 'Ks', Diffuse is 'Kd', but Ambient which is 1.0 is just 0.0 in 'Ka'. How do I change the value of 'Ka' when my materials are exported? $\endgroup$
    – jshbrntt
    Commented Nov 28, 2013 at 19:42
  • 1
    $\begingroup$ @CharlesL: from the link you provided: "To specify the ambient reflectivity of the current material, you can use the "Ka" statement (...)" $\endgroup$
    – Polosson
    Commented Nov 29, 2013 at 0:05

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