This known bug will be fixed in the next release of POV-Ray for Windows.

> Subject: Win95 (and maybe mac) bug: global_settings are persistent
> Date: Mon, 05 Oct 1998 00:29:28 GMT
> From: par### [at] mailfwicom (Ronald L. Parker)
> Newsgroups: povray.bugreports

> Description: I've found an annoying little bug in the Win95 GUI version
> of POVRay, and possibly in other GUI versions.  When you render a scene
> with max_trace_level set to something other than the default, it seems to
> remember that max_trace_level setting for the next render.  To test this,
> do the following:

> 1) create a scene that shows artifacts from a small max_trace_level.
> Render it.

> 2) add a line to the scene setting max_trace_level high enough to remove
> the artifacts.  Render it again.

> 3) remove the line setting max_trace_level and rerender.

> Notice that the result of (3) does not match the result of (1).  While
> this is basically only an annoyance, it may also apply to other global
> settings and should probably be fixed to avoid confusion.

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