Unwanted sharp shadows when using a point lamp I'm learning the basics and while modeling a simple volcano using a point lamp for the magma I keep getting unnatural sharp shadows, even when disabling ray shadow. I don't think the problem is in the mesh (you can find the .blend file in the comments). Here are some examples:



In this case I put the lamp outside the crater. If I disable Ray Shadow here it gets better.



Now placing the lamp inside the crater. Even when I disable Ray Shadow I keep getting those sharp transitions.
You can also try changing the shadow's Soft Size to affect how sharp or blurred the shadows will be.  If you are using Blender Render(Internal), the samples for the shadows are right next to the soft size.  



For Cycles, the lamp size can be used to alter the softness of the shadows.