A combination of photography and 3D architectural visualization is used. Once the object is chosen, it is shot from a point easy to recognize by users, not pretending to achieve the greatest picture ever, but instead, a picture that anybody could do. The shot is the basis to produce a replica of the building by using very detailed photogrammetric techniques that end with the creation of a three-dimensional model that fits almost perfectly into the picture. This three-dimensional model can only be used in that shot because it has intrinsic optical distortions that makes the model impossible to be used in another photograph. When is completed, begins the emulation of the environment light tending to obtain the color gradients that appear in the picture. Then, architectural textures identical to the real object are created. At this point, the 3d building is rendered in order to test how similar is to the original picture. If the resemblance is good enough, then it’s time to apply all the deformations and/or modifications thought at the beginning of the artwork.
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