Using special-purpose groups
Creating decal groups
- DecalGroup extends OrderedGroup and
renders children in first-to-last order
- Children must be co-planar
- All polygons must be facing the same way
- First child is the underlying surface
- The underlying surface must encompass all other children
- Use for rendering decal geometry
- Text, texture decals (eg. airport runway markings)
- Good for avoiding Z-fighting artifacts
