Listing 6. cabin.rif: an input file telling the rad utility
what options and files are used to generate pictures.

# The files that contain the scene
scene=materials cabin  

# Which way is up
UP=+Z

RESOLUTION=1596 1064  # Final rendered image size

# Where to store temporary ambient data
AMBFILE=ambient2.dat

# Set these lower if you want an interactive render
QUALITY=M   # L M or H
PENUMBRAS=T # Penumbras on shadows? T or F
INDIRECT=1  # Indirect lighting calculation depth
DETAIL=M    # L M or H

# lighting variability in your scene L M or H
VARIABILITY=M

# List of views to render 
# The first one is the default in interactive mode
view=exterior -vtv -vp 280 -200 100 \
     -vd -0.707107 0.707107 0 -vu 0 0 1 \
     -vh 100 -vv 90 -vo 0 -va 0 -vs 0 -vl 0