Blender Geometry Nodes Camera Geometric Culling

Content:

A blender scene with a geometry node group to delete points outside the camera field of view.

This method is faster than raycast, but won't delete points occluded by objects within the field of view.  

The node need to be driven by the actual camera focal length to follow it and to be given the image ratio (is width divided by height, this can be calculated with drivers either). The scale factor is usefull to adjust the culling effect outside the camera's edges to avoid instances popping on screen during animations.

The math and geometry node setup comes from Claudio Piciarelli's youtube tutorial: https://www.youtube.com/watch?v=dxIni7l1ZVs

Special thanks to him.

Version: Blender 3.4.1 and more. 

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License: for any use, personnal, educational or commercial. 

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By Sébastien Garnier, March 2023

Contact, feedback, requests: Anabase.studio@gmail.com

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