Concepts

The ideas behind Ymir, for someone trying to make terrain.

• Fields and layers. The one data type, its layers, and the [0, 1] height convention.
• Masks and selections. Scoping an effect to part of the terrain.
• Preview and build. Why the preview approximates and the build is the truth.
• How erosion works with your terrain. Why erosion needs form to carve into.
• Macro form and surface texture. What scale Ymir works at, and why it is relative.
• Landforms are composed, not built in. Making a crater from general nodes.