"Dave Blandston" <nomail@nomail> schreef in bericht 
news:web.4b7dc3e6adaa4c5ecba3fb0f0@news.povray.org...
> Christian Froeschlin <chr### [at] chrfrde> wrote:
>> Ah, but everything you #declare is a variable. The value
>> of the variable P_Cloth just happens to be a pigment. There's
>> nothing special about this variable ...
>>
>> Dave Blandston wrote:
>>
>>  > The restriction would be that once "P_Cloth" is defined as a
>>  > pigment it must remain a pigment.
>>
>> ... which is why this is also incorrect. Feel free
>> to follow it up with
>>
>> #declare P_Cloth = 5;
>>
>> or
>>
>> #declare P_Cloth = sphere {0,1}
>>
>> or even
>>
>> #declare P_Cloth = sphere {0,1 pigment {P_Cloth}}
>>
>> The reason you can use P_Cloth to define P_Cloth is that
>> the right hand side of an assignment is processed first,
>> then the result is assigned to the left hand side.
>

To tell the truth, while I see the positive sides of this, I also feel this 
is highly confusing in the end, as you may lose track of all the 
intermediary stages of variable changes.

Thomas

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