One can use Ray Trace shadows with the Poser 4 renderer if one sets the light's "Shadows" to Ray Trace.  This may actually render faster than depth mapped shadows because no shadow map(s) need to be generated.

If one wants to use depth mapped shadows ... then one needs to take care when setting the "Shadow Blur Radius" and the "Shadow Minimum Bias" parameters in order to achieve a satisfactory result.

cheers,
dr geep
;=]

Remember ... "With Poser, all things are possible, and poseable!"

cheers,

dr geep ... :o]

edited 10/5/2019