On 2/23/25 05:17, kurtz le pirate wrote:
> Do you have any ideas for solving this issue ?

What version of POV-Ray are you using? There were v3.8 development 
versions over time with difference issues.

If not a problematic version of POV-Ray, I'd bet next on something with 
the mesh, but...?

I tried a simple cylinder scene and things look OK test one each of the 
v3.7 and v3.8 compiles I have in hand.

//...
#declare Cyl00 = cylinder {
     <0,-0.1,0>, <0,1,0>, 0.2
     pigment { rgb <0.3,0.5,0.6> }
     finish { emission 0.2 }
}

difference {
   object { Cyl00 translate <-0.7,0,0> }
   plane { y,0 }
   cutaway_textures
}

object { Cyl00 }
//...

Bill P.

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