##RenderMan RIB 

Format 256 256 1   # frame size
Display "frame" "framebuffer" "rgba"
Display "+barn_6_5.tif" "file" "rgba"

Projection "perspective" "fov" [45]
PixelSamples 4 4

Declare "sfreq" "float"
Declare "tfreq" "float"
Declare "seed" "float"
Declare "max_height" "float"
Declare "variation" "float"
Declare "sparse" "float"
Declare "ncones" "float"
Declare "spikiness" "float"
Declare "Ka" "float"
Declare "basecolor" "color"

Scale -1 1 1
Rotate 0 0 0 1
Rotate 0 1 0 0
Rotate 180 0 1 0
Translate 0 0 -2.4

WorldBegin 

LightSource "ambientlight" 1 "intensity" [0.1]
LightSource "distantlight" 2 "intensity" [1] "lightcolor" [1 1 1] "from" [5 5 10] "to" [0 0 0]
LightSource "pointlight" 3 "intensity" [25] "from" [-5 -5 5]

Attribute "displacementbound" "sphere" [.5] "coordinatesystem" ["shader"]

ShadingRate 0.5

Displacement "barndisp"
 "max_height" [0.5] "ncones" [6] "spikiness" [5]
 "sfreq" [6] "tfreq" [6] "sparse" [0] "variation" [4] "seed" [15]

Surface "barncolor"
 "ncones" [6]
 "sfreq" [6] "tfreq" [6] "sparse" [0] "variation" [4] "seed" [15]
 "basecolor" [1 1 1]
# "basecolor" [0.5 0.4 0.35]


Rotate -45 1 0 0
Patch "bilinear" "P" [-1 -1 0 1 -1 0 -1 1 0 1 1 0]

WorldEnd