Efficient algorithms for local and global accessibility shading
SIGGRAPH '94 Proceedings of the 21st annual conference on Computer graphics and interactive techniques
Pyramid-based texture analysis/synthesis
SIGGRAPH '95 Proceedings of the 22nd annual conference on Computer graphics and interactive techniques
Modeling and rendering of metallic patinas
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Flow and changes in appearance
SIGGRAPH '96 Proceedings of the 23rd annual conference on Computer graphics and interactive techniques
Modeling and rendering of weathered stone
Proceedings of the 26th annual conference on Computer graphics and interactive techniques
SIGGRAPH '85 Proceedings of the 12th annual conference on Computer graphics and interactive techniques
A procedural approach to authoring solid models
Proceedings of the 29th annual conference on Computer graphics and interactive techniques
A BRDF Postprocess to Integrate Porosity on Rendered Surfaces
IEEE Transactions on Visualization and Computer Graphics
IEEE Computer Graphics and Applications
A Geometry Dependent Texture Generation Framework for Simulating Surface Imperfections
Proceedings of the Eurographics Workshop on Rendering Techniques '97
Corrosion: simulating and rendering
GRIN'01 No description on Graphics interface 2001
GRIN'01 No description on Graphics interface 2001
Light reflection functions for simulation of clouds and dusty surfaces
SIGGRAPH '82 Proceedings of the 9th annual conference on Computer graphics and interactive techniques
Technical Section: A survey of aging and weathering phenomena in computer graphics
Computers and Graphics
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In human constructions, repetitive patterns can be handled by different texturing methods. However, almost all techniques do not consider weathering phenomena, missing a very important visual effect for realistic rendering. Among a great number of weathering effects occurring on constructions - in particular on fired-clay brick walls - efflorescence implies important visual changes and their removal (surface cleaning) is an economic problem in numerous countries. Due to the complexity of the physics involved, we propose in this paper an original phenomenological simulation of this weathering process on fired-clay bricks. In this case, efflorescence is materialized by a thin white powdery deposit of water-soluble salts on the surface or in the pores of masonry. We propose a method to generate the texture of efflorescence-affected fired-clay brick. First, we synthesize a brick solid texture from digital photographs using a classical solid texturing technique. Then, we add efflorescence by a phenomenological algorithm representing salt transport and crystallization in porous building materials for each brick separately. We can build aged walls by changing the parameters of efflorescence for each brick.