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How to configure the scene

filename result/simple.png
# Image resolution
width 1024
height 768
# The number of samples per pixel
spp 8 
# The number of maximum depth to track rays
depth 5
# Background color
background 0.5 0.5 0.5

# Camera settings
beginCamera
origin 0 0 -70
lookat 0 0 0 
up 0 1 0
focus_length 15.0
aperture 0
endCamera

# Ground plane
beginPrimitive 
shape plane min -100 -100 max 100 100
material checker color1 0.3 0.3 0.3 color2 0.9 0.9 0.9
endPrimitive

# Sphere
beginPrimitive
shape sphere 1
translate 0 1 0
maaterial dielectric color 1 1 1 ior 1.5
endPrimitive