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I am trying to apply an image with a horizon line of a city on a plane.

enter image description here

The face I'm trying to apply it to is like a trapezoid shape.

enter image description here

But when I preview the render in rendered view, the horizon line seems skewed (bottom right preview):

enter image description here

If I change the size of the two vertices on the left in UV image viewer, I get a rendered preview that makes me feel like the plane isn't really plane, and that Blender is adding an invisible edge to deal with this:

enter image description here

I've found this question here "How to flatten a face to avoid distortion (make an ngon planar)", but none of the solutions on this question helped solve it.

Blend:

Note: this model is inspired from the works of Patrick Hughes.

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  • $\begingroup$ it's easier to help you if you pack the images as part of the file.... $\endgroup$ – cegaton Jun 12 '16 at 7:39
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I think that for what you are trying to do you need to set the right ortho view and unwrap using project from view (bounds):

enter image description here

Then set your material to actually use that newly created UV map as coordinates:

enter image description here

enter image description here

If you still have some deformation, use a subsurf modifier, but instead of the default Catmul-Clark subdivision use Simple

enter image description here

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Can you "pack the image/imbed it into the file"? the texture isnt in the .blend file.

I think what you need to do is edit the UV island to be a square instead of a trapezoid

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    $\begingroup$ to ask for clarification on the question please use comments. $\endgroup$ – cegaton Jun 12 '16 at 6:47

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