It's really not a rendering bug, you see

@article{Woo1996ItsRN,
  title={It's really not a rendering bug, you see},
  author={Andrew Woo and Andrew Pearce and Marc J. Ouellette},
  journal={IEEE Computer Graphics and Applications},
  year={1996},
  volume={16},
  pages={21-25}
}
Most rendering algorithms deliberately employ approximations and other shortcuts for efficiency. [] Key Result This imbalance warrants more research into proper solutions to these and similar problems.
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Background Citations
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Methods Citations
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References

SHOWING 1-10 OF 12 REFERENCES

Survey of Texture Mapping

The fundamentals of texture mapping are surveyed, which can be spilt into two topics: the geometric mapping that warps a texture onto a surface, and the filtering necessary to avoid aliasing.

R.E versus N.H Specular Highlights

Illumination for computer generated pictures

Human visual perception and the fundamental laws of optics are considered in the development of a shading rule that provides better quality and increased realism in generated images.

Models of light reflection for computer synthesized pictures

A more accurate function for the generation of hilights which is based on some experimental measurements of how light reflects from real surfaces is presented, which differs from previous models in that the intensity of the hilight changes with the direction of the light source.

Computer Display of Curved Surfaces

  • Henry Gouraud
  • Computer Science
    Outstanding Dissertations in the Computer Sciences
  • 1971
The smooth shading technique described here has been used to produce a large variety of pictures of which several airplanes, a car, a human face and some mathematical surfaces are included to illustrate the effect of the method.

An improved illumination model for shaded display

Consideration of all of these factors allows the shader to accurately simulate true reflection, shadows, and refraction, as well as the effects simulated by conventional shaders.

Continuous Shading of Curved Surfaces

  • H. Gouraud
  • Computer Science
    IEEE Transactions on Computers
  • 1971
The surface is approximated by small polygons in order to solve easily the hidden-parts problem, but the shading of each polygon is computed so that discontinuities of shade are eliminated across the surface and a smooth appearance is obtained.

Ray tracing complex models containing surface tessellations

An approach to ray tracing complex models containing mathematically defined surfaces is presented, whereParametric and implicit surfaces are first tessellated into triangles, and the resulting triangles are organized in a hierachy of lists and 3D grids, allowing efficient calculation of ray/model intersections.

Ray tracing with polarization parameters

Comparisons of identical scenes rendered with a conventional ray tracer and the Ray tracer presented incorporating a polarization model show that the present method renders specular interobject reflections more accurately with respect to reflected radiance and color.

Essential ray tracing algorithms