Seeing in black and white
Black and white conversions are radical transformations of images. They’re about reestablishing the tonal foundations of an image. That’s quite different than dodging and burning, or lightening and darkening locally, which is a matter of accentuating existing tonal relationships.
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This tutorial covers ways to create a terrain and control a flow of particle moving on the terrain in Virtools. Textured dunes: download at http://www.tinkering.net/sciviz/terraindune.cmo The landscape is created With Dune color, for texture and with Dune black-and-white, for displacement map. Please note that the pictures can be created in Photoshop or from a digital camera. You can use the same image for a texture and for a displacement map. You may end up using a black and white image for the displacement map because sometimes you want to have more control over the topography.
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