3.3 Other particle-based
rendering
technologies
The above mainly discussed the modeling technology of mountain stone, an
important component of landscape painting. Other modeling techniques
based on particle deposition described below are only a supplement and
example of the above modeling methods. These modeling concepts are
completely consistent with the above mountain stone modeling based on
particle deposition and stacking (overlapping) technology, except that
some landscape painting objects, such as ink trees and raindrop
textures, do not necessarily need textures, or only need a color ink
setting method similar to shallow landscape painting.
1)Particle\sout-based tree rendering
Suppose that particle deposition is stacked according to the tree growth
model of the extended L system to generate a particle swarm, and the
particle size is adaptively constrained according to the tree shape
defined by the extended L system, then the boundary formed by the
periphery of the particle swarm can produce a shape similar to a tree.
Figure 10 shows the particle tree generated by particle stacking. In
addition, we made a comparison between normal rendering and ink
rendering. In ink rendering, set the color of the overall shader to
grayish black, the transparency of the tube shader to completely
transparent, the color to grayish black, and the tip fade to about 0.6.
Set the softening degree of the brush to above medium level, as shown in
Figure 11.