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I am trying to render some images of a building I modelled that is using an alpha-map. I connected all the nodes in the material and both normal and specular are displayed as intended in material preview and rendered image. Additionally, I added an ambient occlusion node to be added on the building.

What is not properly displayed however, is the Alpha map. Faces which use Alpha are rendered solid black, showing neither the diffuse nor the alpha cutouts. In the material preview (image 2) this is shown as intended, when rendered however, the black faces appear (image 1).

I am using Blender 4.2.1 LTS and want to use Cycles to render images.

Any help is much appreciated. Thanks in advance. :)

Model shown in Render preview with black alpha faces

Model shown in material viewport shading, presenting the alphaed faces as intended

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  • $\begingroup$ Your node tree as an unconnected socket in the Mix Shader node $\endgroup$ Commented Sep 1 at 10:08
  • $\begingroup$ We can't see anything in the pictures, can you have a better resolution? $\endgroup$ Commented Sep 2 at 0:55

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The answer to this problem has been found - it was a mixture of a) overlapping faces and b) using static AO in the material, an older approach that is no longer necessary for rendering in Cycles. Putting some small distance between the overlapping faces and getting rid of the AO component in the material fixed it.

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