Thanks for your reply Grimber.

In my test level, the obstacle is just a regular block...so if I understand you correctly, this will not
be considered during clipping.

Quote:

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if the obstical is just a block in a single room won't effect it as say 2 seperate room blosk with a path between. the obstical a bock or a map entity/model

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I'm not sure I fully understood this previous statement...could you re-phrase that another way please?

thanks