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the surface should be and this changes the way that light is simulated to reflect from the surface of the sphere. However, its size and shape are not changed in 3D-space. Consequently, the object's outline and the shadow cast on the ground remain those of a perfect, non-bumpy sphere. An unrealistic hard shadow is also visible on the surface of the sphere, about a third of the way from the top.
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207:. The technique is limited in that it does not modify the shape of the underlying object in 3D-space. On the left, a mathematical function defining a bump map simulates a crumbling surface on a perfect sphere, but the sphere's outline and shadow are unaffected. On the right, the same function is used to model a roughly spherical object by generating an
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On the right is a roughly spherical object on which wrinkles have been modelled in 3D-space. Mathematically, the same "agate" function is subtracted from a function defining a sphere, x+y+z-Radius, and all points in space where this sum is zero define the surface of the resulting object, referred to
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On the left is a perfect sphere which has been given a wrinkled surface using a bump map. Mathematically, POV-Ray's internal "agate" function is used to define a value for each point on the surface of the sphere. This value is used as an apparent height of the sphere's surface above or below where
182:. This results in an object that is a modification in 3D-space of an otherwise perfect sphere. Consequently, the object's outline and the shadow cast on the ground are also visibly wrinkled, and the shadowing on the surface of the object is more realistic.
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Click on a date/time to view the file as it appeared at that time.
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I, the copyright holder of this work, release this work into the
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copyrighted, dedicated to the public domain by copyright holder
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Knowledge:Picture peer review/File:Bump map vs isosurface.png
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In some countries this may not be legally possible; if so:
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released into the public domain by the copyright holder
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Add a one-line explanation of what this file represents
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Commons is a freely licensed media file repository.
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Knowledge:Picture peer review/Archives/Oct-Dec 2010
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1529:https://commons.wikimedia.org/user:GDallimore
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660:// ----------------------------------------
390:// ----------------------------------------
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1999:The following other wikis use this file:
1964:. The bumpy surface of the sphere to th
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153:Bump map vs isosurface2.png
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
