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These are screentshot from YAPComp Group Flying Logo. The trickiest part was that the original logo was drawn in Corel Draw! but the client wanted the 3d model look closefully with the 2d drawing. I think if it looked from an orthographic front view it doesn't matter, but the client wanted the look seem in perspective view. First problem was the golden globe. It needed look flat but actually 3d. I solved with a hemisphere which had normals flipped and used F/X ( visibility control ) to deal with this one, so I could make the "earthly" globe appeared from within.
The second problem and the most difficult was the big twin arch. For the smallest part I didn't get aby problem, but in the biggest part the problem risen.
The client wanted that in the biggest part of the arch look closefully to the 2d drawing, so it must have circle crosssection. But when it meet the cylindrical core, it radius must fit with the cylinder radius!! So I must modeled an arch that was big enough when look from the front view, but at the same tome must look small enough when looked from top above. After long time get frustrated trying nearby all modeling technics ( included NURBS, lofting, surface patch, lathe, polygon etc ) with combination of many many modifiers, at least I choose F/X. I modeled it as it must be formed ( so the crosssection was in ellips shape ) but I never shown the model until it looked from front view. I then made the arch "grow" using particle system. When looked from top above, it closely seem like the request because of the action of motion blur and a few particle jittering. As the viewturn toward front view, the real arch slowly appear. The final scene was single rendered frame which edited using Alien Skin Black Box in Adobe Photoshop.