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point based occlusion vop not working?

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I was interested in learning how to use point clouds in a vop shader and so took a look at the Houdini Exchange ->


"Hip Files From Point Cloud Presentation May 11th 2005"

I am getting errors in the render- dark patches and light patches (see images). These patches appear in a different part of the image every time I render it.

I guess the original shader I copied is quite old ... so there may be some compatibilty issues ... not sure.

I am trying to figure out how to create point based occlusion in vops. If any one could take a look at the hip I would much appreciate it.

(the point cloud needs to be generetated first obj->geo1->rop_geometry1)






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