Volumetric Billboards
Abstract
We introduce an image-based representation, called volumetric billboards, allowing for the real-time rendering of semi-transparent and visually complex objects arbitrarily distributed in a 3D scene. Our representation offers full parallax effect from any viewing direction and improved anti-aliasing of distant objects. It correctly handles transparency between multiple and possibly overlapping objects without requiring any primitive sorting. Furthermore, volumetric billboards can be easily integrated into common rasterization-based renderers, which allows for their concurrent use with polygonal models and standard rendering techniques such as shadow-mapping. The representation is based on volumetric images of the objects and on a dedicated real-time volume rendering algorithm that takes advantage of the GPU geometry shader. Our examples demonstrate the applicability of the method in many cases including levels-of-detail representation for multiple intersecting complex objects, volumetric textures, animated objects and construction of high-resolution objects by assembling instances of lowresolution volumetric billboards.
Domains
Graphics [cs.GR]
Fichier principal
VolumetricBillboards_CGF09.pdf (8.21 Mo)
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city.png (1023.74 Ko)
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VolumetricBillboards.avi (53.1 Mo)
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_teaser.png (944.55 Ko)
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_tree_grass.png (656.85 Ko)
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dragon_bunny.png (777.99 Ko)
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fig_belt.png (1.49 Mo)
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lods_zoom_compare3ds.png (817.58 Ko)
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torus.png (343.26 Ko)
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tree_patch.png (366.5 Ko)
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