Try this as a last resort, put hierarchy off inside the blob statement.
I've done animations where the internal bounding of blobs caused serious
problems.

Since you are using transparent blobs, you probably just need to raise
max_trace_level though.

-Mike


> Povray 3.02 renders these blobs with lots of black dots on them. It
> usually helps
> to tweak blob_threshold a bit but so far these black dots never
> disappear entirely.
> I have tried may things which include using the keyword sturm, different
> texture maps
> at different positions i.e. individual and global but nothing seems to
> help.
> Does anyone have an idea why that might be (black dots) and possibly
> know what to do about it ?
> (The reason why I am using blobs is that I need to model transparent
> tubes with round
> ends. When I merge cylinders and spheres the whole thing gets terribly
> slow -
> so blobs are a lot faster but they don't seem to work.)
> Any ideas ?
> Thanks,
>

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