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I am wondering if possible to mark known points (different colors or like this) on a sphere and getting its coordinates in image plane? I need that for an idea to model a fisheye camera. Any suggestions?

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  • $\begingroup$ I try to do a circle of small sphere. May it will be going! $\endgroup$ Commented Apr 15, 2015 at 19:21
  • $\begingroup$ I'm not sure if I fully understand your question correctly but I added one possible answer to highlight points on a sphere and get their coordinates in the rendered image. $\endgroup$
    – TobiMarg
    Commented Apr 20, 2015 at 14:58

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You could give one or more faces of a sphere a different material (to make the faces smaller subdivide the sphere). Then you could render the scene and press the left mouse button make the coordinates show up.

  1. First add a sphere and two materials with different colors. Then switch to edit mode and change the selection mode to faces.

Create two materials and change selection mode to faces

  1. Now select one or more faces and the second (in this case red) material. Press Assign to assing this material to the selected face. To see the selected material in the 3D view select the shading mode Material.

Assign the material and select "material" shading

  1. Render the scene and press the left mouse button on one of the colored points. The (image) coordinates are shown at the bottom left corner of the image view.

Render and press LMB to show coordinates

Here is an animation of the whole process.

the whole process

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