HowTo:Fix unexpected invisibility - Revision history

Maurice: /* Objects */

2021-05-13T20:02:10Z

Objects

Maurice: Added media item

2021-05-13T19:55:27Z

Added media item

Maurice: Just saw an existing link as an invitation to propose content. Sorry if bad styling feel free to improve or remove :-)

2021-05-13T17:05:01Z

Just saw an existing link as an invitation to propose content. Sorry if bad styling feel free to improve or remove :-)

New page

One thing to check is whether your object is declared AND instanciated in the scene. So in the case of pre declared objects you could often find something like this :
<source lang="pov">
// -- The bare necessities are here : Camera & light --
camera {
location <0.0, 0.5, -4.0>
direction 1.5*z
right x*image_width/image_height
look_at <0.0, 0.0, 0.0>
}

light_source {
<0, 0, 0> // light's position (translated below)
color rgb <1, 1, 1> // light's color
translate <-30, 30, -30>
}

// ----------------------------------------

// The object to be shown is declared here:
#declare MySphere =
sphere {
0, 0.5
pigment {color rgb <0.9,0.5,0.3>}
}

// ----------------------------------------
// But if one ommited the line below or commented it out :
object { MySphere } //Name could typcally followed by some transforms
//Then the object would only be declared but never instanciated
</source>

@@ Line 26: / Line 26: @@
 // ----------------------------------------
-// But if one ommited the line below or commented it out :
+// But if one ommited the line below or commented it out... :
-object { MySphere } //Name could typcally followed by some transforms
+object { MySphere } //Sidenote: Some transforms could follow MySphere
-//Then the object would only be declared but never instanciated
+//...The object would only be declared but never instanciated
 </source>
 === Media ===
-Any emissive media IS totaly transparent by design. It adds to whatever is behind, wighout filtering anything out. So if your media just disappears over the background, what you can do is :
+Any emissive media IS totaly transparent by design. It adds to whatever is behind, without filtering anything out. So if your media just disappears over the background, what you can do is :
 * To add some absorbing media with <code>absorbtion<0,1,1></code> ...Removes the blue and green, leaving the red.

@@ Line 1: / Line 1: @@
 One thing to check is whether your object is declared AND instanciated in the scene. So in the case of pre declared objects you could often find something like this :
 <source lang="pov">
@@ Line 29: / Line 30: @@
 //Then the object would only be declared but never instanciated
 </source>