Weird spiky shadows around the edges of my walls 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.
Something like that generates Sun light.

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

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.


Edit
Later I noticed - light still penetrates the corners

Enable Contact Shadow subpanel and play a bit with values

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