> Basically, it's the log function.  In an image with the variable "close"
>   defined as false you can see the problems as black shapes in the hole.
>
> With close set to true, the camera is moved right into the hole and the
> sides are not smooth.


Without looking very closely at the code, I predict that you can solve the
problem by either reducing the "accuracy" or increasing the "max_gradient".
Check the documentation for each.

 - Slime
 [ http://www.slimeland.com/ ]

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