You're right, I read a lot, but I forget most of what I just read eg. about differences between z-pass & z-fail shadows, now work it (see the screenshot, the dynamic light is far far away)

In Manual under remarks about stencil shadows:
> Z-fail stencil shadows ... "A script can be used for tracing a ray from a light source to the camera, and automatically switching to z-fail (You mean to z-pass or I´m wrong?) shadows when the ray hits an obstacle.
Perhaps is there possible to add this as new features like this:
shadow_stencil = -2; or shadow_stencil = -4;
The z-fail stencil shadows will be automatic switching to the z-pass stencil shadows when the light source come close to the camera, without extra coding?