On 3/6/23 18:36, Leroy wrote:
>> AFAIK, you don't need any of this stuff any more, because POV-Ray automatically
>> determines the file type, and so those keywords can be omitted.
> I do! my version 3.7.0.RC7.mevc10.sse.win323.7 will let you do this
> 
> plane{z,0 pigment{image_map{"Uimage.tga"}} finish{ambient 1}}
> 
> but not this :
> 
> #declare I_File="Uimage.pgm";
> 
> plane{z,0 pigment{image_map{I_File}} finish{ambient 1}}

Yes, this one of the changes v3.7 to v3.8. Christoph made updates so 
more often POV-Ray can find and digest the input image file without an 
explicit type.

It remains true, you do occasionally need to specify the file type in 
both versions depending upon run time options and the image file naming.

To re-fresh my own memory of the status in both versions(a), I created 
the attached test scene.

Bill P.

(a) - The v4.0 master branch on github currently matches v3.8 beta 2.

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