Changing the looks of the shadow caster

[rdb]

Also, you should fine-tune the frustum of the light so that it encapsulates only the objects that cast shadow, to make better use of the real estate of the shadow map.

See this sample for more details:

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 …

The sample also includes a GLSL shader (which is not required) in case you do want to create a custom shadowing shader.