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How to group faces with normal point to the camera ?


Barakooda

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Group SOP/Normal tab there is Backface From parameter

there you choose the camera and all primitives/points facing your camera will be selected

to reverse that selection just use Combine tab of the same Group SOP and set your new group not equal old group

(new group name and old group name can be the same)

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If you need more control like a specific facing ratio then use a dot product between the geometry normal and a reference normal (by the difference in position of the geometry and the position of the camera).

thanks guys

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