Wanderer On The Road wrote:

> hrm.... Any good tutorials on how to use #while?

There is a good basic introduction to loops at this site in the povabilities
section - http://www.spake.org/rtimes/

-- 
Ken Tyler

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"bob h" <omn### [at] charternet> wrote in message
news:3c68d377$1@news.povray.org...
> "Wanderer On The Road" <non### [at] fakeaddresscom> wrote in message
> news:3c688c39@news.povray.org...
> >
> > Modeling something that will be 2D-ish. See my plan is to make a scene
> that
> > will then be image_mapped on to an object (in this case a painter's
> canvas).
> >
> > hrm.... Any good tutorials on how to use #while?
>
> http://www.students.tut.fi/~warp/povVFAQ/whileloops.html
>
> That should do nicely if you can be a little technical about it, since
Warp
> can often be I know :-)

Well since I'm often accused (usualy correctly) of thinking too much I bet I
can figure it out ^_~


> Yeah, the render within a render can be pretty neat, as many online
> galleries can attest to.

Yes, though is there anything I can do to the painting scene that will make
it look slightly unfinished with out resorting to post trace effects in like
the gimp?


--
Wanderer On The Road
     Many religions are the story of man trying to reach out to God
     Christianity is the story of God trying to reach out to man.

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"Wanderer On The Road" <non### [at] fakeaddresscom> wrote in message
news:3c6df0a4@news.povray.org...
>
> "bob h" <omn### [at] charternet> wrote in message
> news:3c68d377$1@news.povray.org...
>
> > Yeah, the render within a render can be pretty neat, as many online
> > galleries can attest to.
>
> Yes, though is there anything I can do to the painting scene that will
make
> it look slightly unfinished with out resorting to post trace effects in
like
> the gimp?

Any number of things are possible I suppose.  One thing that comes to mind
is material_map to take the rendered image and make incomplete parts to it,
hence unfinished.  Likewise by using a patterned layered texture with
image_map(s) as the main pigment.
Getting a oil painting look to it wouldn't be difficult, making different
brush stroke effects for each color region.  Kind of an in-POV Photoshop
filter effects just by applying various normals and finishes for those color
regions.

bob h

Take a look at this simplified form of that:

camera {
  location  -2*z
  right     x*image_width/image_height
  look_at   0
}

light_source {
  0,1
  translate <-5, 5, -30>
}

// textures for material map
#declare T0=texture {pigment {rgb 0}}
#declare T1=texture {pigment {rgb <0,1,0>}
 normal {wrinkles 0.25 scale 0.025}
  finish {specular 0.4 roughness 0.01}}
#declare T2=texture {pigment {rgb <1,1,0>}
 normal {granite 0.125 scale 0.125}
  finish {specular 0.2 roughness 0.025}}
#declare T3=texture {pigment {rgb <1,1,1>}
 normal {bumps 0.1 scale 0.1}
  finish {specular 0.3 roughness 0.0125}}
#declare T4=texture {pigment {rgb <0,1,1>}
 normal {marble 0.1 scale 0.1 turbulence 1}
  finish {specular 0.5 roughness 0.005}}
#declare T5=texture {pigment {rgb 1}}

plane {
  z, 0
  texture {
      material_map {
        png "materialmap.png" // 256 color bitmap (of your rendering)
        once
        interpolate 2

        texture {T0} // index 0
       #declare Index=1;
       #while (Index<25)
        texture {T1}
       #declare Index=Index+1;
       #end
       #while (Index<100)
        texture {T2}
       #declare Index=Index+1;
       #end
       #while (Index<150)
        texture {T3}
       #declare Index=Index+1;
       #end
       #while (Index<255)
        texture {T4}
       #declare Index=Index+1;
       #end
        texture {T5} // index 255
    }
      translate -0.5
      scale <4/3,1,1>*2
  }
}

To get better resolution of colors and textures into your image you'll need
to increase the number of entries.

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"bob h" <omn### [at] charternet> wrote in message
news:3c6e65af@news.povray.org...
> "Wanderer On The Road" <non### [at] fakeaddresscom> wrote in message
> news:3c6df0a4@news.povray.org...
> >
> > "bob h" <omn### [at] charternet> wrote in message
> > news:3c68d377$1@news.povray.org...
> >
> > > Yeah, the render within a render can be pretty neat, as many online
> > > galleries can attest to.
> >
> > Yes, though is there anything I can do to the painting scene that will
> make
> > it look slightly unfinished with out resorting to post trace effects in
> like
> > the gimp?
>
> Any number of things are possible I suppose.  One thing that comes to mind
> is material_map to take the rendered image and make incomplete parts to
it,
> hence unfinished.  Likewise by using a patterned layered texture with
> image_map(s) as the main pigment.
> Getting a oil painting look to it wouldn't be difficult, making different
> brush stroke effects for each color region.  Kind of an in-POV Photoshop
> filter effects just by applying various normals and finishes for those
color
> regions.

Ok I'll look into that after I choose a palm leaf method. Did OE nuke the
thread or did the server? I can't seem to find the beginning few posts
anymore.

> Take a look at this simplified form of that:
[snip]
>         png "materialmap.png" // 256 color bitmap (of your rendering)
[snip]
> To get better resolution of colors and textures into your image you'll
need
> to increase the number of entries.

Is that's what is limiting the material map to 8bit color as opposed to 24
or 32 bit?


--
Wanderer On The Road
     Many religions are the story of man trying to reach out to God
     Christianity is the story of God trying to reach out to man.

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Wanderer On The Road wrote:
> Did OE nuke the thread or did the server? I can't seem to find
> the beginning few posts anymore.

OE done it.

-- 
Ken Tyler

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"Wanderer On The Road" <non### [at] fakeaddresscom> wrote in message
news:3c6ed704@news.povray.org...
>
> Is that's what is limiting the material map to 8bit color as opposed to 24
> or 32 bit?

Yep.  That's the downside to this, having to lower a 24 bit image to 8 bit
and thereby reducing the image quality.  You either get banded colors or
dithering.
I was going to use an example which would put the original image underneath
a clear material map so just the normals with specular highlights are
overlayed.  Could still be done that way too I guess, only need a second
object to place the image_map on.  Can't layer textures when material_map is
used, at least I don't think so.

About OE removing messages, check Tools menu, Options then Maintenance.  The
delete after so many days is what does it.

bob h

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"Ken" <tyl### [at] pacbellnet> wrote in message
news:3C6EEF11.C8ADAA78@pacbell.net...
>
>
> Wanderer On The Road wrote:
> > Did OE nuke the thread or did the server? I can't seem to find
> > the beginning few posts anymore.
>
> OE done it.

Fun, it's still on the server I hope. So like I can nuke this news account
and recreate it and find it again?


--
Wanderer On The Road
     Many religions are the story of man trying to reach out to God
     Christianity is the story of God trying to reach out to man.

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Wanderer On The Road wrote:

> Fun, it's still on the server I hope. So like I can nuke this news account
> and recreate it and find it again?

I reckon so.

-- 
Ken Tyler

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"bob h" <omn### [at] charternet> wrote in message
news:3c6f1f89@news.povray.org...
> "Wanderer On The Road" <non### [at] fakeaddresscom> wrote in message
> news:3c6ed704@news.povray.org...
> >
> > Is that's what is limiting the material map to 8bit color as opposed to
24
> > or 32 bit?
>
> Yep.  That's the downside to this, having to lower a 24 bit image to 8 bit
> and thereby reducing the image quality.  You either get banded colors or
> dithering.
> I was going to use an example which would put the original image
underneath
> a clear material map so just the normals with specular highlights are
> overlayed.  Could still be done that way too I guess, only need a second
> object to place the image_map on.  Can't layer textures when material_map
is
> used, at least I don't think so.

Well actually I was thinking about image_maping the render on to a polygon
and then unioning that to the painter's canvas. Is that the sort of thing
you meant?

> About OE removing messages, check Tools menu, Options then Maintenance.
The
> delete after so many days is what does it.

Done. I'll mess with getting the thread back later.


--
Wanderer On The Road
     Many religions are the story of man trying to reach out to God
     Christianity is the story of God trying to reach out to man.

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"Wanderer On The Road" <non### [at] fakeaddresscom> wrote in message
news:3c75da4a@news.povray.org...
>
> Well actually I was thinking about image_maping the render on to a polygon
> and then unioning that to the painter's canvas. Is that the sort of thing
> you meant?

Close enough anyway.  Simply that it would take at least two objects,
whether it be plane + plane, box (infinitely thin) + box, polygon + box, or
whatever.  One to hold the image, one to act as layer over it.  Except what
you describe means yet another polygon would be needed to place in front of
the image polygon, for the way I was talking about.  Which is a physical
object layer holding a transparent yet normal and finish modified surface on
top of a unmodified image.

Might seem more complicated than it is, but that's how I might proceed to
work around the "cannot layer patterned textures" problem that otherwise
happens with a material map being applied as layered texture.

bob h

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