avariant wrote:

> vector from the camera position to the object's center.  But I want to
> evaluate the angle between the camera vector and the normal of EACH surface
> point which means, based on the point, the vector from the camera is always
> changing.

I think the "aoi" pattern in MegaPOV would be just what you need.
It is similar to slope, except that instead of a fixed direction
vector, either a reference point or the direction of the incoming
rendering ray is used.

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