Fast Photo-Realistic Rendering of Trees in Daylight

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Date
2003
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Publisher
Blackwell Publishers, Inc and the Eurographics Association
Abstract
We propose a fast approach for photo-realistic rendering of trees under various kinds of daylight, which is particularlyuseful for the environmental assessment of landscapes. In our approach the 3D tree models are transformedto a quasi-3D tree database registering geometrical and shading information of tree surfaces, i.e. their normalvectors, relative depth, and shadowing of direct sunlight and skylight, by using a combination of 2D buffers.Thus the rendering speed of quasi-3D trees depends on their display sizes only, regardless of the complexity oftheir original 3D tree models. By utilizing a two-step shadowing algorithm, our proposed method can create highquality forest scenes illuminated by both sunlight and skylight at a low cost. It can generate both umbrae andpenumbrae on a tree cast by other trees and any other objects such as buildings or clouds. Transparency, specularreflection and inter-reflection of leaves, which influence the delicate shading effects of trees, can also be simulatedwith verisimilitude.Categories and Subject Descriptors (according to ACM CCS): I.3.7 [Computer Graphics]: Three dimensional Graphics and Realism
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@article{
10.1111:1467-8659.00671
, journal = {Computer Graphics Forum}, title = {{
Fast Photo-Realistic Rendering of Trees in Daylight
}}, author = {
Qin, Xueying
and
Nakamae, Eihachiro
and
Tadamura, Katsumi
and
Nagai, Yasuo
}, year = {
2003
}, publisher = {
Blackwell Publishers, Inc and the Eurographics Association
}, ISSN = {
1467-8659
}, DOI = {
10.1111/1467-8659.00671
} }
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