hi,

On 10/09/2017 16:03, clipka wrote:
> Am 10.09.2017 um 16:01 schrieb Stephen:
>> On 10/09/2017 14:27, clipka wrote:
>>> Am 10.09.2017 um 15:13 schrieb Stephen:
>>>> If I trace an object. How can I get the colour of the intersection of
>>>> the ray and object. As far as I can see trace() only returns the normal.
>>> You'll need to know the pigment of the object, and invoke `eval_pigment`
>>> on the intersection point you get...
>> Thanks, I had a blank in my memory.
>>> ... and hope that the pigment isn't UV-mapped,
>> Hope is not involved because there is a good chance I would want to do
>> that. Is it at all possible?
> No; not with the current versions of POV-Ray. The `trace` function would
> have to be extended to report the UV coordinate of the intersection, so
> that you could then feed it into `eval_pigment` instead of the 3D
> coordinate.

do I understand this correctly?  if I trace some object with a regular
pigment it will work, but the trace will fail if the object's
pigment/colour is "not simple"?  seems .. strange.

regards, jr.

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