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I am new to blender and was trying to model an interior of a room. I used an Irradiance volume around the entire house and an environmental lighting. In the render properties, I have enabled ambient occlusion and screen space reflections with default settings. After baking the indirect lighting, I am getting these spiky shadows around the edges of the walls. enter image description here

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    $\begingroup$ It is quite hard to see what we are looking at (in this kind of detail). It looks like a forest on horizon in a fogy weather behinde a glass :) OK Would be better to post simplified blend via blend-exchange.giantcowfilms.com Do you have a lights in corners or is it penetrated from outside? $\endgroup$
    – vklidu
    Oct 6, 2020 at 6:01
  • $\begingroup$ yes there are area lights on the edges of the ceiling. And yes behind the window i have an environmental lighting. $\endgroup$
    – user107604
    Oct 6, 2020 at 11:15
  • $\begingroup$ I cant reproduce the issue, please share your simplified file as suggested in my comment. Try remove all objects that doesn't contribute on the issue. Thanks $\endgroup$
    – vklidu
    Oct 6, 2020 at 12:31

1 Answer 1

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Something like that generates Sun light.

enter image description here

You can try to get rid of by Shadow - Cascade Shadow Map - Max Distance, but seems to be a tricky solution.

enter image description here

This effect is such visible when Lamp light is switched to Sun where Strenght of light is too high (1000). Lower value to 3 is ussually fine in most cases.

enter image description here


Edit
Later I noticed - light still penetrates the corners

enter image description here

Enable Contact Shadow subpanel and play a bit with values

enter image description here

... or, instead all of this, use another type of light :)

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  • $\begingroup$ How do you fix it? $\endgroup$ Oct 6, 2020 at 13:02
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    $\begingroup$ @marcellothearcane answer edited $\endgroup$
    – vklidu
    Oct 10, 2020 at 8:56

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