James Bigler: CS6620 Homework Final

Show off my ray tracer!

Click to see a 1000x1000 image of my scene.

This one has the entire image in focus.

The things I added to my raytracer were

• simple csg (dice)
• one bounce indirect lighting calculation
• Distance attenuated light sources (needed for the one indirect lighting)
• Smooth triangular meshes
• Even distribution of randomness (fuzzy reflection, depth-of-field, soft shadows) by precomputing samples for each pixel.

Well, it took me forever to model this thing. All the models are to scale. I spent a while measuring all the houses and hotels, game board, cards, and money. The room is completely enclosed with off-white walls, white ceiling, and a green floor.

Some things to note

• The top of the board was too large for my scanner, so I had to scan it in 5 pieces and photoshop it together. I think it turned out nice. The final image was 2865x2873.
• There are five player pieces. Each has a different material.
  • Gray - diffuse only
  • Red - specular highlights
  • Blue - 50% reflective
  • Yellow - Dielectric, index of refraction 1.3
  • Marble - Perlin Noise texture
• The pawns were modeled by me with a spline patch modeler called sPatch. The geometry was then exported as smooth triangles and read in by my code. The geometry has 8512 triangles.
• The table has fuzzy reflection and you can see the image of a Star Wars Episode IV poster.
• The board also has fuzzy reflection, but you can't see it too well. Only in some spots.
• I modeled the little houses and hotels myself then used instancing to spread them all over. The hotels are actually houses with a red material and scaled up.
• There is also depth of field. I used an aperture of 1 cm.
• The entire scene was modeled in centimeter scale.
• There was tons of instancing. Almost every single object was instanced. The stack of cards are an instance of several instances all slightly displaced to give it more of a real effect. That instance was then added to the game board instance which was rotated on the table. The dice are from the same instance, but one is rotated to give a different roll. This is an example of where instancing does you well. :)