// Sample scene.
    //      yuqk caps_open_features.pov +w800 +h800 +p
    #version unofficial 3.8; // yuqk
    #if (file_exists("version.inc"))
        #include "version.inc"
    #end
    #if (!defined(Fork_yuqk))
        #error "This POV-Ray SDL code requires the yuqk fork."
    #end
    global_settings { assumed_gamma 1.0 }
    #declare Camera00 = camera {
        perspective
        location <1,0.3,-3.001>*0.7
        sky y
        angle 35
        right x*(image_width/image_height)
        look_at <0,0,0>
    }
    #declare VarOrthoMult =
        5.0/max(image_width/image_height,image_height/image_width);
    #declare Camera01z = camera {
        orthographic
        location <0,0,-2>
        direction z
        right VarOrthoMult*x*max(1,image_width/image_height)
        up VarOrthoMult*y*max(1,image_height/image_width)
    }

    #declare White = srgb <1,1,1>;
    #declare Light00 = light_source { <50,150,-250>, White }
    #declare Red = srgb <1,0,0>;
    #declare CylinderX = cylinder { -1*x, 1*x, 0.01 pigment { Red } }
    #declare Green = srgb <0,1,0>;
    #declare CylinderY = cylinder { -1*y, 1*y, 0.01 pigment { Green } }
    #declare Blue = srgb <0,0,1>;
    #declare CylinderZ = cylinder { -1*z, 1*z, 0.01 pigment { Blue } }

    // Liberation fonts usually ship with Linux distributions.
    // Use command: 'fc-list | grep LiberationMono' to find
    // the location on your computer.
    #declare
    //  FontFile = "/home/pokorny/Fonts/LiberationMono-Regular.ttf"
        FontFile = "/home/pokorny/Fonts/UbuntuMono-R.ttf"
    #declare String = "XYZ 123"

    // Use Chris R method to determine character pitches
    #local _T1 = text { ttf FontFile "A"  1.0, 0 }
    #local _T2 = text { ttf FontFile "AA" 1.0, 0 }
    #local _T3 = text { ttf FontFile "│"  1.0, 0 }
    #local _T1sz = max_extent(_T1) - min_extent(_T1);
    #local _T2sz = max_extent(_T2) - min_extent(_T2);
    #local _T3sz = max_extent(_T3) - min_extent(_T3);
    #declare _Cwidth  = (_T2sz - _T1sz).x;
    #declare _Cheight =          _T3sz.y;

    #declare TxtrO = texture {
        pigment { rgb <0.5,0.5,0> }
        finish { emission <0.1,0,0> }
    }
    #declare TxtrI = texture {
        pigment { rgb <0,0.5,0.5> }
        finish { emission <0,0.1,0> }
    }

    #declare Depth = 1;
    #declare TxtPosThickness = text {
        ttf FontFile
        String, +Depth, <0,0,0>
        texture          { TxtrO }
        interior_texture { TxtrI }
        translate <-3.5*_Cwidth,-_Cheight/4,0>
    }
    #declare TxtNegThickness = text {
        ttf FontFile
        String, -Depth, <0,0,0>
        texture          { TxtrO }
        interior_texture { TxtrI }
        translate <-3.5*_Cwidth,-_Cheight/4,0>
    }

    #declare TxtPosThickness_caps = text {
        ttf FontFile
        String, +Depth, <0,0,0>
        caps on
        texture          { TxtrO }
        interior_texture { TxtrI }
        translate <-3.5*_Cwidth,-_Cheight/4,0>
    }
    #declare TxtNegThickness_caps = text {
        ttf FontFile
        String, -Depth, <0,0,0>
        caps on
        texture          { TxtrO }
        interior_texture { TxtrI }
        translate <-3.5*_Cwidth,-_Cheight/4,0>
    }

    #declare TxtPosThickness_open = text {
        ttf FontFile
        String, +Depth, <0,0,0>
        open on
        texture          { TxtrO }
        interior_texture { TxtrI }
        translate <-3.5*_Cwidth,-_Cheight/4,0>
    }
    #declare TxtNegThickness_open = text {
        ttf FontFile
        String, -Depth, <0,0,0>
        open on
        texture          { TxtrO }
        interior_texture { TxtrI }
        translate <-3.5*_Cwidth,-_Cheight/4,0>
    }
    #declare U00 = union {
        object { TxtPosThickness      translate <0,+5*_Cheight,0> }
        object { TxtNegThickness      translate <0,+4*_Cheight,0> }
        object { TxtPosThickness_caps translate <0,+3*_Cheight,0> }
        object { TxtNegThickness_caps translate <0,+2*_Cheight,0> }
        object { TxtPosThickness_open translate <0,+1*_Cheight,0> }
        object { TxtNegThickness_open translate <0,+0*_Cheight,0> }
        translate <0,-2.5*_Cheight,0>
        scale 0.2
    }

    //---
        camera { Camera00 }
    //  camera { Camera01z }
        light_source { Light00 }

        #if     (1)
            object { U00 }
        #elseif (0)
            intersection {  // negative thickness text{}
                object { U00 }
                box { <-1,-1,-0.10>,<+1,+1,-0.05> }
            }
        #elseif (0)
            intersection {  // positive thickness text{}
                object { U00 }
                box { <-1,-1,+0.05>,<+1,+1,+0.10> }
            }
        #end

        sphere { 0, 0.005 pigment { rgb 0.2 } }