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I am a new in Blender. I am creating a house and collided with problem. I created 2 windows. The first window is ok but the stranger things are happenning with the light of the second window.light does not pass through the window

probably everything is fine

there are obvious distortions

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    $\begingroup$ Welcome to Blender.SE. You should provide more information about your scene setup in order to receive a good aswer. What is exactly your light setup? Is there any modifier on the wall object? What are the picture showing? Is it the same window at different levels of zoom? $\endgroup$
    – Carlo
    Apr 7, 2018 at 10:20
  • $\begingroup$ On the first picture light dont pass thought window, the second - probably everything is fine, the third - there are obvious distortions. No modifier on the wall object. It is the same object under the different angles of view in render mode. $\endgroup$
    – B.Akulin
    Apr 7, 2018 at 10:52
  • $\begingroup$ Maybe i solve my problem. In the settings of material i change the IOR to 1.000 and the light looks fine. $\endgroup$
    – B.Akulin
    Apr 7, 2018 at 10:57
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    $\begingroup$ Most likely you have negatively scaled one of the windows, resulting in the normals being flipped. Go into Edit mode, select all, Recalculate or Flip Normals and see if that helps. $\endgroup$ Apr 7, 2018 at 11:05
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    $\begingroup$ I can double Rich Sedman's comment and add that your windows glass should have thickness. Not only are your normals probably the wrong way, but most importantly the whole room is filled with glass, because you didn't end the windows face. $\endgroup$ Apr 7, 2018 at 12:07

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I helped to add a thickness to my window since I made a window from plane. Also i helped to change paramert IOR to 1.000. Maybe normals were flipped too.

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Your normals could be flipped.. incase that's what you have to fix ...Consider selecting all faces in Edit Mode and Press CTRL+N on your Keyboard. Hope this would fix

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