Shadow display error issue

[Evgeni_Popov]

Maybe this post can help, at least to compute the position of the light and the minZ/maxZ properties:

Best shadow parameters for specific scene

One way to do it is to get the bounding box of the mesh (+sub meshes), compute a bounding sphere for it and use the center of the sphere to compute a point on that sphere in the inverse direction of the light: that will be the light position. The shadow max Z is simply the diameter of the sphere: Be careful, however, because it creates a quite tightly fit frustum of the mesh, but some filtering methods require that the frustum intersects with the mesh receiving the shadow (the plane in the P…

You can disable the automatic calculation of the light frustum extents (light.autoUpdateExtends = false) and calculate the orthoLeft/orthoRight/orthoTop/orthoBottom properties yourself, based on the scene’s bounding box, but limiting the values if they are too high (to avoid losing precision in the shadow map). If you do this, you may not get shadows for the most distant objects, but there are trade-offs. You can also try using [cascading shadow maps] (Cascaded Shadow Maps | Babylon.js Documentation).