When you wall climb on clip material and then move to geometry, even if the surfaces are flush and on the same plane you can sometimes get 'caught' on the change and waste part of your impulse count/energy.
It's kinda hard to reproduce, but is quite an issue (caused me to lose a survivor round on Ubik).
It seems to be caused by not being parallel to the normal of the surface, at angles of about 20 degrees off and facing into the 'next' 1m block (8 little ones). EG, being on the left of the line and look to the right.
Attached is a map I made to test this, the purple sections are covered in clip, the yellow isn't. The centre of the green line shows a 1m boundary (so maybe some casting to int?).
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