You might post an image of what you are after and we could suggest how you can do it? Do you want more detail for your blocky buildings? Or are you after a shaded poche? Is this to be photoreal? Or sketchy schematic? Or ultra-spare, clean schematic - more of a graphic design exercise? Why not just a linear gradient masking fill? Is it colur? Or B&W?
Andy Thomson, M.Arch, OAA, MRAICDirector
Thomson Architecture, Inc.Instructor/Lecturer, Toronto Metropolitan University Faculty of Engineering & Architectural Science
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