LookAt 2 2 5   0 -.4 0 0 1 0
Camera "perspective" "float fov" [30 ]

Film "image" "integer xresolution" [1000 ] "integer yresolution" [500 ] 
    "string filename" "spheres-differentials-texfilt.exr"

Integrator "directlighting" "integer maxdepth" [10]

Sampler "halton" "integer pixelsamples" [4]
PixelFilter "box"

WorldBegin
LightSource "distant" "point from" [0 10 0 ] "point to" [0 0 0 ]
    "color L" [3.141593 3.141593 3.141593 ] 

AttributeBegin
	Translate .25 0 0
	Texture "checker" "color" "checkerboard" 
		"string mapping" "planar"
		"vector v1" [ 1 0 0 ] "vector v2" [ 0 0 1]
		"string aamode" ["none"]
Texture "lines-tex" "color" "imagemap" "string filename" "textures/lines.png"
	"float uscale" [100] "float vscale" [100]
"bool trilinear" "true"
	Material "matte" "texture Kd" "lines-tex"
    Shape "trianglemesh"  "integer indices" [0 2 1 0 3 2 ] 
	"point P" [-100 -1 -100 400 -1 -100 400 -1 400 -100 -1 400 ] 
        "float st" [ 0 0 1 0 0 1 1 1]
AttributeEnd

Translate -1.3 0 0 
Material "mirror"
Shape "sphere"

Translate 2.6 0 0 
Material "glass"
Shape "sphere"
WorldEnd