A Method for Generating Weathering Textures Containing Water Flow Stains
for Outdoor Scenes
Fujiwa Kato, Kazufumi Kaneda, Hideo Yamashita
Transactions of Infomation Processing Society of Japan,
Vol. 41, No. 3, pp. 577-585 (2000) (in Japanese)
ABSTRACT
When rendering outdoor scenes for landscape evaluation,
weathering textures mapped onto objects play an important role
in creating realistic images.
This paper presents a method for generating weathering textures containing
water flow stains in a simple manner.
The proposed method calculates the tracks of water flow on approximated
shapes of three-dimensional objects using a water droplet model with
a discretized surface, and renders the stains by painting the tracks of
water flow with dirt color.
The natural stains corresponding to rugged surfaces and tiled wall patterns
can be generated.
Textures generated by the proposed method have been mapped onto electric
power facilities and buildings to demonstrate the usefulness of the method.
Keywords: Weathering, Water flow stains, Texture mapping, Realistic image synthesis
Figure 5: Stain color patterns.
(Left: k_1=0.01; Right: k_1=0.5)
Figure 7: Stain adhering along a rugged surface pattern.
(Left: generated texture; Right: rugged pattern)
Figure 8: Stain adhering along a tiled wall pattern.
Figure 9: Aging effect by image interpolation.
Figure 12: Resultant textures.
Figure 13 (b): Examples of application.
Figure 13 (d): Examples of application.
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