In this article, I will introduce how to use following functions.
- Build (Build)
- Decimate (Reduce polygon count)
- Edge Split (Edge Separation)
*The version of Blender used in this article is 2.92.
This article is a continuation of the previous introduction article, so if you haven’t read the previous article yet, please go ahead and look at that one first.
Build is a function to make an object appear gradually in an animation.
|Start Frame||Start frame|
|Length||Length of the animation|
The value of Length is displayed as the number of frames.
For example, if you set this to 100, the animation of the object appearing will be played over 100 frames.
Reversed plays the animation in reverse.
Checking the Randomize checkbox will randomize the appearance of objects.
Changing the seed value will change the order in which the polygons are randomly displayed.
Since the granularity of the objects appearing in the animation depends on the number of polygons, this cube has been subdivided in advance using the Subdivide function.
Subdivide is also present in the modifier, but it can be easily applied by switching to Edit Mode with the tab key, then right-clicking and selecting Subdivide.
Note, however, that this method does not use the modifier tool and cannot be re-edited.
This function allows you to reduce the number of polygons and vertices in an object with a large number of polygons.
|Collapse||Apply almost evenly to the entire object|
|Ratio||Ratio to apply|
|Symmetry||Symmetry around a specified direction|
|Vertex Group||Specifies a vertex group|
The Face Count item shows the number of polygons.
In this case, I downloaded a model of the sculpture from Sketchfab and used it.
Adjust the Ratio value between 1.0 and 0.0 (one polygon).
The more you reduce the number of polygons, the rougher the surface will be, so it’s best to keep an eye on it and change the value little by little.
As the name implies, this function allows you to split edges. If you use this function on a cube by default, all edges will be split, but you can change the setting to apply it only to some edges.
|Edge Angle||Applies to angles less than or equal to the specified value|
|Sharp Edges||Apply to sharp edges|
Sharp Edges allows you to use the edge separation function on only a portion of the edges specified by the Sharp function.
To do so, simply select a specific edge, right-click, and then click Make Sharp.
Switch to edit mode with the tab key, select an edge, and then G (Move) → Move the cursor to see the separated edges.
In the next article, we will introduce the basic operations of Generate Geometry Nodes.