The details from the "messy" mesh are transferred to the new re-topologized mesh by baking a DisplacementMap or NormalMap. Messy meaning that it either has too much detail or has a topology that's not the best for texturing, shading, or animation. Re-topology means creating a new mesh surface from scratch, that conforms to an existing "messy" mesh, often created via digital sculpting. Decimation is also used for creating LevelOfDetail (LOD) models. Decimation tools should preserve the model's essential form without degrading texture coordinates or material boundaries. Decimation makes a detailed model easier to load, manipulate, and render in other applications. They may be created via DigitalSculpting or Subdivision Surface Modeling. To decimate means to reduce the triangle count of a highly-detailed model. Often these tools include 3D painting as well. Usually the details from these models are baked into textures for a lower-resolution in-game model. These tools are used to create a high-resolution 3D model with a series of painting strokes, using a pressure-sensitive tablet or screen.
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Most animation is done in the Main 3D Software Packages, though here are some tools that specialize just in animation. These packages are used mostly for 3D modeling, but they often have additional features as well. Sometimes artists will use specific modeling tools, to speed up their workflow.
Most modeling is done in the Main 3D Software Packages.
Please also note that the prices below may be different, if upgrading from already own package. However external packages are often used in conjunction with the main package, since some of the included tools are often not quite as efficient or strong as external specialized packages. These are "complete" 3D packages with a wide variety of art tools. This category describes software used by artists for game development.
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