My scene has 5 directional lights, 1 centered where the camera is, and 4 other directional lights surrounding it. This gives the center shadow high detail, and the outer shadows low detail.
The problem is that if I set every directional light to have an intensity, the scene gets very bright as these combine. So I therefore tried setting each light intensity to 1/5. This solves the brightness issue, but it makes shadows no longer cast from trees/models onto other trees/models (only very faintly).
If I set the central light to normal intensity, and the other to 0 or 0.0001, the shadows come back for the central light, but not for the other lights, causing the issue you can see in the below image:
Trees despite being in shade are still lit up.
Is there a way to restrict directional light to it’s own frustum? Or is there another solution?