Shadow problem ： Just produces a small shadow

[serega-kkz]

You need to adjust this according to the size of your scene.

sunLight.node().getLens().setFilmSize(20, 20)

This will additionally help:

Sample: using directional lights+shadows effectively

Using directional lights with shadowing can often be a stumbling block for Panda users. Fitting the frustum around the scene properly can be tricky. So here is a little sample program that shows how to use directional lights effectively. It includes a function that will tightly fit the frustum around the scene, for static, smaller scenes (press 1 to use it automatically). This is great for smaller scenes or where the light is static and there is no time-of-day, because it is slow to compute …