used to create the subject in Mesh #3 Iso is called a vortex method.
The rotations that make up a turbulent flow can be described by a
collection of small vortex elements, represented in this method by
short segments. Each vortex element influences air near it to rotate
around it. The summation of the effects of all of these vortex elements
creates a complicated flowfield that we recognized as turbulence.
The computer simulation marches forward in time, updating the position
of the mesh at regular time intervals. The mesh of vortex lines is
periodically written to a file in the form of a long list of cylinder
Test renders were made of several interesting-looking "frames"
in this time sequence. The frame that worked best was one that exhibited
enough wall interaction while retaining some remnant of the initial
symmetry. An isometric view was chosen to reveal the sharp boundaries
of the virtual box enclosing the flow.
The scene in Refinery 53 was far simpler to design, though more attention
to detail was required during the piece's execution. Custom software
was written to fill a Cartesian grid space with continuous and non-overlapping
pipe segments. Parameters to the program were varied and output visualized
until a scene with sufficient visual density was created. The cylindrical
viewpoint and high resolution warranted a detailed and time-consuming
pseudo-radiosity calculation in the rendering stage.
All of my rendering is done with Radiance because it incorporates
a lighting model that can calculate the effect of light interreflection
throughout the scene quickly and accurately. This, more than clever
light placement or excessive texture mapping, allows an image to instill
a sense of realism.
Once the scene has been described, Radiance compiles it into an octree,
which is then used to speed up intersection tests in the raytracing
routine. During rendering, results from the interreflection calculation
are cached in a separate file. This aids in view selection by reducing
the turnaround time for preview renders.
Programs included with Radiance were used to downsample the final
rendered image and reduce the intrinsic high-dynamic-range image for