Here are a few test scenes for use with trace. I recommend you start with these scenes and once you're sure they work fine, try the more complicated scenes bundled with the raytracer.
Download these as a single group.
cyl_emissive.ray |
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This scene is designed to test the emissive shading term. |
SBT-raytracer 1.0 // cyl_emissive.ray // Test for the emissive term camera { position = (5, 0, 0); viewdir = (-1, 0, 0); updir = (0, 1, 0); } // The cylinder should turn out a solid red. rotate( 1, 0, 0, 1.6, rotate( 0, 1, 0, -0.5, cylinder { material = { emissive = (0.5, 0, 0); } } ) ) |
cyl_ambient.ray |
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This scene is designed to test the ambient shading model. |
SBT-raytracer 1.0 // cyl_ambient.ray // Test for the ambient term ambient_light { color = (1.0, 1.0, 1.0); } camera { position = (5, 0, 0); viewdir = (-1, 0, 0); updir = (0, 1, 0); } // This scene doesn't need any directional/point // lights since the material on the cylinder has // an ambient color. // The cylinder should turn out a solid red. rotate( 1, 0, 0, 1.6, rotate( 0, 1, 0, -0.5, cylinder { material = { ambient = (0.5, 0, 0); } } ) ) |
cyl_diffuse.ray |
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This scene is designed to test for the diffuse term. |
SBT-raytracer 1.0 // cyl_diffuse.ray // Test for the diffuse term camera { position = (5, 0, 0); viewdir = (-1, 0, 0); updir = (0, 1, 0); } // This is a directional light coming from the // left of the scene. directional_light { // Direction is automatically normalized direction = (-1, -0.5, -1); color = (1, 0, 1); } // The cylinder should turn out a shaded blue. rotate( 1, 0, 0, 1.6, rotate( 0, 1, 0, -0.5, cylinder { material = { diffuse = (0, 0, 0.8); } } ) ) |
cyl_diff_spec.ray |
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This scene tests for the specular term in addition to the diffuse term. |
SBT-raytracer 1.0 // cyl_diff_spec.ray // Test for specular term added to diffuse camera { position = (5, 0, 0); viewdir = (-1, 0, 0); updir = (0, 1, 0); } // This is a directional light coming from behind us directional_light { direction = (-1, 0, 0); color = (1, 0, 1); } // The cylinder should have a specular highlight // in the middle. rotate( 1, 0, 0, 1.6, cylinder { material = { diffuse = (0, 0, 1); specular = (1, 0, 1); shininess = 128.0; } } ) |
box_dist_atten.ray |
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This scene tests for distance attenuation of lights. |
SBT-raytracer 1.0 // box_dist_atten.ray // Test for distance attenuation camera { position = (7, 0, 0); viewdir = (-1, 0, 0); updir = (0, 0, 1); } // Point light just above the center of the box. point_light { position = (0, 0, 1); color = (1, 1, 1); constant_attenuation_coeff= 0.2; linear_attenuation_coeff = 0.3; quadratic_attenuation_coeff = 0.0; } // The box forms a plane, which should be noticably // brighter in the middle than on the edges translate( 0, 0, -2, scale( 15, 15, 1, box { material = { diffuse = (0, 1, 0); } } ) ) |
box_cyl_reflect.ray |
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This scene tests for reflection. |
SBT-raytracer 1.0 // box_cyl_reflect.ray // Test the reflection term // Don't forget to increase the trace depth to >= 2! camera { position = (15, 0, 5); viewdir = (-1, 0, -.3); updir = (0, 0, 1); } // Using ambient intensity of 0.25 ambient_light { color = (0.25, 0.25, 0.25); } // Directional light which shouldn't // cast any shadows directional_light { direction = (-1, 0, -0.2); color = (1, 1, 1); } // The box forms a plane, which should reflect the cylinder translate( 0, 0, -2, scale( 15, 15, 1, box { material = { diffuse = (0.5, 0, 0); specular = (0.5, 0.5, 0.5); reflective = (1, 1, 1); shininess = 2.56; } } ) ) // We'll give this a little ambient intensity to ensure // that the bottom, which doesn't face the light, is still // reflected properly (this is a common hack, since with // raytracing you don't have diffuse-diffuse reflections) translate( 0, 0, 1, cylinder { material = { ambient = (0, 1, 0); diffuse = (0, 0.5, 0); specular = (0.5, 0.5, 0.5); reflective = (1, 1, 1); shininess = 2.56; } } ) |
sphere_refract.ray |
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This scene tests for refraction. |
SBT-raytracer 1.0 // cyl_cyl_refract.ray // Test the refraction term // Don't forget to increase the trace depth to >= 2! camera { position = (5, 0, 0); viewdir = (-1, 0, 0); updir = (0, 0, 1); } directional_light { direction = (-1, -1, -0.2); color = (1, 1, 1); } // Sphere acts as a lens scale(.2, 1.5, 1.5, sphere { material = { diffuse = (0, 0.12, 0); transmissive = (0.7, 0.7, 0.7); index = 1.5; } } ) // Add a couple of crossed cylinders behind the sphere to // see the refractive effect. // Note that the reason these are emissive is that otherwise // you have problems if transparent shadows aren't implemented. translate( -2, -1, -10, scale( .2, .2, 20, cylinder { material = { diffuse = (0.5, 0.12, 0.4); specular = (0.2, 0.3, 0.3); emissive = (0.8, 0.5, 0.4); index = 1.5; } } ) ) translate( 0, 0.5, 0, rotate( 1, 0, 0, .6, translate( -2, -1, -10, scale( .2, .2, 20, cylinder { material = { diffuse = (0.4, 0.12, 0.3); specular = (0.2, 0.3, 0.3); emissive = (0.8, 0.0, 0.4); index = 1.5; } } ) ) ) ) |
box_cyl_opaque_shadow.ray |
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Tests for opaque (non-transparent) shadows. |
SBT-raytracer 1.0 // box_cyl_opaque_shadow.ray // Test opaque shadows camera { position = (15, 0, 5); viewdir = (-1, 0, -.3); updir = (0, 0, 1); } // This light should cast the shadow of the // cylinder on the box. point_light { position = (3, 0, 6); color = (1, 1, 1); constant_attenuation_coeff= 0.25; linear_attenuation_coeff = 0.003372407; quadratic_attenuation_coeff = 0.000045492; } // The box forms a plane translate( 0, 0, -2, scale( 15, 15, 1, box { material = { diffuse = (0.5, 0, 0); } } ) ) translate( 0, 0, 1, cylinder { material = { diffuse = (0, 0.9, 0); ambient = (0, 0.3, 0); } } ) |
box_cyl_transp_shadow.ray |
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Tests for semi-transparent shadows. Note that the cylinder's diffuse and ambient terms have also been reduced to give it a darker appearance. |
SBT-raytracer 1.0 // box_cyl_transp_shadow.ray // Test transparent shadows. camera { position = (15, 0, 5); viewdir = (-1, 0, -.3); updir = (0, 0, 1); } // This light should cast the shadow of the // cylinder on the box. point_light { position = (3, 0, 6); color = (1, 1, 1); constant_attenuation_coeff= 0.25; linear_attenuation_coeff = 0.003372407; quadratic_attenuation_coeff = 0.000045492; } // The box forms a plane translate( 0, 0, -2, scale( 15, 15, 1, box { material = { diffuse = (0.5, 0, 0); } } ) ) translate( 0, 0, 1, cylinder { material = { ambient = (0, 0.09, 0); diffuse = (0, 0.27, 0); transmissive = (0.7, 0.7, 0.7); } } ) |
texture_map.ray |
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Tests texture mapping. |
SBT-raytracer 1.0 // texture_map.ray // Test texture mapping // Don't forget to increase the trace depth to >= 2! camera { position = (15, 0, 5); viewdir = (-1, 0, -.3); updir = (0, 0, 1); } directional_light { direction = (-0.2, 0.2, -2); color = (.7, .7, .7); } directional_light { direction = (-1, -0.5, -0.3); color = (.6, .6, .6); } // The box forms a plane, which should reflect the cylinder translate( 0, 0, -2, scale( 15, 15, 1, box { material = { diffuse = map( "checkerboard.bmp" ); specular = (0.5, 0.5, 0.5); reflective = (0, 0, 0); shininess = 2.56; } } ) ) translate( 0, 0, 2, scale( 2, sphere { material = { specular = (0.8, 0.8, 0); reflective = (0.7, 0.7, 0); diffuse = (0.2, 0.2, 0); shininess = 256; } } ) ) |
recurse_depth.ray |
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Tests for larger amounts of recursive depth. |
SBT-raytracer 1.0 camera { position=( 5.45747,3.76998,-3.59695 ); viewdir=( -0.764302,-0.392387,0.511737 ); updir=( -0.331679,0.919753,0.209865 ); fov=45; } point_light { position=( 2.47975,3.75486,-4.72242 ); color=( 0.631513,0.625613,1 ); constant_attenuation_coeff= 0.25; linear_attenuation_coeff = 0.003372407; quadratic_attenuation_coeff = 0.000045492; } point_light { position=( 7.30154,3.91592,-0.313475 ); color=( 1,0.507951,0.490585 ); constant_attenuation_coeff= 0.25; linear_attenuation_coeff = 0.003372407; quadratic_attenuation_coeff = 0.000045492; } directional_light { direction=( -0.764302,-0.392387,0.511737 ); color=( 1,1,1 ); } polymesh { name=""; material={ diffuse=( 0.7,0.7,0.7); ambient=( 0.2,0.2,0.2); specular=( 0,0,0); emissive=( 0,0,0); shininess=25.6; transmissive=( 0,0,0 ); }; points=( ( -9.22972,0.68411,7.30672 ),( -9.22972,-1.31589,7.30672 ),( -7.22972,-1.31589,7.30672 ),( -9.22972,0.68411,7.30672 ),( -7.22972,-1.31589,7.30672 ),( -7.22972,0.68411,7.30672 ),( -9.22972,0.68411,-7.49376 ),( -7.22972,0.68411,-7.49376 ),( -7.22972,-1.31589,-7.49376 ),( -9.22972,0.68411,-7.49376 ),( -7.22972,-1.31589,-7.49376 ),( -9.22972,-1.31589,-7.49376 ),( -9.22972,0.68411,7.30672 ),( -9.22972,0.68411,-7.49376 ),( -9.22972,-1.31589,-7.49376 ),( -9.22972,0.68411,7.30672 ),( -9.22972,-1.31589,-7.49376 ),( -9.22972,-1.31589,7.30672 ),( -7.22972,0.68411,7.30672 ),( -7.22972,-1.31589,7.30672 ),( -7.22972,-1.31589,-7.49376 ),( -7.22972,0.68411,7.30672 ),( -7.22972,-1.31589,-7.49376 ),( -7.22972,0.68411,-7.49376 ),( -9.22972,0.68411,7.30672 ),( -7.22972,0.68411,7.30672 ),( -7.22972,0.68411,-7.49376 ),( -9.22972,0.68411,7.30672 ),( -7.22972,0.68411,-7.49376 ),( -9.22972,0.68411,-7.49376 ),( -9.22972,-1.31589,7.30672 ),( -9.22972,-1.31589,-7.49376 ),( -7.22972,-1.31589,-7.49376 ),( -9.22972,-1.31589,7.30672 ),( -7.22972,-1.31589,-7.49376 ),( -7.22972,-1.31589,7.30672 ) ); faces=( ( 0,1,2),( 3,4,5),( 6,7,8),( 9,10,11),( 12,13,14),( 15,16,17),( 18,19,20),( 21,22,23),( 24,25,26),( 27,28,29),( 30,31,32),( 33,34,35) ); } polymesh { name=""; material={ diffuse=( 0.5,0,0); ambient=( 0.2,0.2,0.2); specular=( 0,0,0); emissive=( 0,0,0); shininess=25.6; transmissive=( 0,0,0 ); }; points=( ( 1.10973,1.59225,1.41654 ),( 0.883627,1.50968,1.46927 ),( 2.01407,-1.0298,2.34018 ),( 1.10973,1.59225,1.41654 ),( 2.01407,-1.0298,2.34018 ),( 2.24017,-0.947233,2.28745 ),( 1.08845,1.50419,1.18738 ),( 2.21889,-1.03529,2.05829 ),( 1.99279,-1.11786,2.11102 ),( 1.08845,1.50419,1.18738 ),( 1.99279,-1.11786,2.11102 ),( 0.862348,1.42162,1.24011 ),( 1.10973,1.59225,1.41654 ),( 1.08845,1.50419,1.18738 ),( 0.862348,1.42162,1.24011 ),( 1.10973,1.59225,1.41654 ),( 0.862348,1.42162,1.24011 ),( 0.883627,1.50968,1.46927 ),( 2.24017,-0.947233,2.28745 ),( 2.01407,-1.0298,2.34018 ),( 1.99279,-1.11786,2.11102 ),( 2.24017,-0.947233,2.28745 ),( 1.99279,-1.11786,2.11102 ),( 2.21889,-1.03529,2.05829 ),( 1.10973,1.59225,1.41654 ),( 2.24017,-0.947233,2.28745 ),( 2.21889,-1.03529,2.05829 ),( 1.10973,1.59225,1.41654 ),( 2.21889,-1.03529,2.05829 ),( 1.08845,1.50419,1.18738 ),( 0.883627,1.50968,1.46927 ),( 0.862348,1.42162,1.24011 ),( 1.99279,-1.11786,2.11102 ),( 0.883627,1.50968,1.46927 ),( 1.99279,-1.11786,2.11102 ),( 2.01407,-1.0298,2.34018 ) ); faces=( ( 0,1,2),( 3,4,5),( 6,7,8),( 9,10,11),( 12,13,14),( 15,16,17),( 18,19,20),( 21,22,23),( 24,25,26),( 27,28,29),( 30,31,32),( 33,34,35) ); } polymesh { name=""; material={ diffuse=( 0,0.5,0); ambient=( 0.2,0.2,0.2); specular=( 0,0,0); emissive=( 0,0,0); shininess=25.6; transmissive=( 0,0,0 ); }; points=( ( 1.75036,1.08025,1.19355 ),( 1.56586,1.23536,1.24476 ),( -0.0563729,-0.999873,2.17072 ),( 1.75036,1.08025,1.19355 ),( -0.0563729,-0.999873,2.17072 ),( 0.128124,-1.15498,2.11952 ),( 1.66176,1.05012,0.965601 ),( 0.039529,-1.18512,1.89156 ),( -0.144968,-1.03001,1.94277 ),( 1.66176,1.05012,0.965601 ),( -0.144968,-1.03001,1.94277 ),( 1.47727,1.20523,1.0168 ),( 1.75036,1.08025,1.19355 ),( 1.66176,1.05012,0.965601 ),( 1.47727,1.20523,1.0168 ),( 1.75036,1.08025,1.19355 ),( 1.47727,1.20523,1.0168 ),( 1.56586,1.23536,1.24476 ),( 0.128124,-1.15498,2.11952 ),( -0.0563729,-0.999873,2.17072 ),( -0.144968,-1.03001,1.94277 ),( 0.128124,-1.15498,2.11952 ),( -0.144968,-1.03001,1.94277 ),( 0.039529,-1.18512,1.89156 ),( 1.75036,1.08025,1.19355 ),( 0.128124,-1.15498,2.11952 ),( 0.039529,-1.18512,1.89156 ),( 1.75036,1.08025,1.19355 ),( 0.039529,-1.18512,1.89156 ),( 1.66176,1.05012,0.965601 ),( 1.56586,1.23536,1.24476 ),( 1.47727,1.20523,1.0168 ),( -0.144968,-1.03001,1.94277 ),( 1.56586,1.23536,1.24476 ),( -0.144968,-1.03001,1.94277 ),( -0.0563729,-0.999873,2.17072 ) ); faces=( ( 0,1,2),( 3,4,5),( 6,7,8),( 9,10,11),( 12,13,14),( 15,16,17),( 18,19,20),( 21,22,23),( 24,25,26),( 27,28,29),( 30,31,32),( 33,34,35) ); } polymesh { name=""; material={ diffuse=( 0,0,0.5); ambient=( 0.2,0.2,0.2); specular=( 0,0,0); emissive=( 0,0,0); shininess=25.6; transmissive=( 0,0,0 ); }; points=( ( 1.44495,1.30329,1.33211 ),( 1.20455,1.3574,1.33299 ),( 0.631632,-1.1662,-0.00437981 ),( 1.44495,1.30329,1.33211 ),( 0.631632,-1.1662,-0.00437981 ),( 0.87203,-1.22031,-0.00525898 ),( 1.46903,1.41383,1.1132 ),( 0.896111,-1.10977,-0.224166 ),( 0.655713,-1.05566,-0.223287 ),( 1.46903,1.41383,1.1132 ),( 0.655713,-1.05566,-0.223287 ),( 1.22863,1.46794,1.11408 ),( 1.44495,1.30329,1.33211 ),( 1.46903,1.41383,1.1132 ),( 1.22863,1.46794,1.11408 ),( 1.44495,1.30329,1.33211 ),( 1.22863,1.46794,1.11408 ),( 1.20455,1.3574,1.33299 ),( 0.87203,-1.22031,-0.00525898 ),( 0.631632,-1.1662,-0.00437981 ),( 0.655713,-1.05566,-0.223287 ),( 0.87203,-1.22031,-0.00525898 ),( 0.655713,-1.05566,-0.223287 ),( 0.896111,-1.10977,-0.224166 ),( 1.44495,1.30329,1.33211 ),( 0.87203,-1.22031,-0.00525898 ),( 0.896111,-1.10977,-0.224166 ),( 1.44495,1.30329,1.33211 ),( 0.896111,-1.10977,-0.224166 ),( 1.46903,1.41383,1.1132 ),( 1.20455,1.3574,1.33299 ),( 1.22863,1.46794,1.11408 ),( 0.655713,-1.05566,-0.223287 ),( 1.20455,1.3574,1.33299 ),( 0.655713,-1.05566,-0.223287 ),( 0.631632,-1.1662,-0.00437981 ) ); 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