About Rendering - Civil 3D 2020
A realistic rendering of a 3D model can often
give a product team or prospective client a clearer vision of a
conceptual design than a plotted drawing.
Rendering
is the process of creating a raster image based on the 3D objects in a
scene. A renderer is used to calculate the appearance of the materials
attached to the objects in a scene, and how lighting and shadows are
calculated based on the lights placed in a scene. Environmental and
exposure settings of the renderer can be adjusted to control the final
rendered image.
While
the final goal of rendering is to create an artistic or photorealistic
presentation-quality image, you might need to create many renderings
before you reach that goal. The basic rendering workflow is to attach
materials to the 3D objects of a model, place user-defined lights, add a
background, and start the renderer with the RENDER command.
A
rendered image can be created for a new model without attaching
materials, placing user-defined lights, and adding a background. By
default, a default material is added to all 3D objects in a model and
the renderer automatically uses two default distant lights when
user-defined lights are not placed in a scene. As an alternative to the
two default distant lights, you can specify the use a single default
distant light that shines from over-the-shoulder. Default lights cannot
be moved or adjusted.
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