Filters are the second type of Operator Object in Terraform4D. While generators are used to add new features to your terrain, filters will alter, adjust, and fine tune it to your needs.
Terraform4D provides you with several different filters.
This operator basically acts like the Brightness / Contrast functions in your favourite image processing application. It offsets and scales the height field.
Remap your terrain’s altitude by applying a curve to it. Choose from staple preset curves like Canyonize, Glaciate, Plateau, Terraces, or Dunes, or create your own custom curve.
This operator folds height fields around a top or bottom altitude, turning summits into craters, or valleys into hills. The optional turbulence function makes creating very natural looking structures a breeze.
This operator smoothens your terrain by applying high quality blur kernels to it. This helps you to get rid of artefacts, sharp edges, or excess detail.
This operator squeezes out some extra detail by sharpening a height field using different convolution kernels.
Use this if you think your terrain looks too soft or too round, and you want more detail without actually adding new features.
This operator constrains a height field between two altitude levels by scaling or clipping it.
Use it to precisely constrain the terrain to a desired altitude, or to create interesting structures by clipping the terrain.
This operator simulates the effect of natural abrasion and erosion on the terrain.
Two kinds of erosion are supported so far: Thermal Weathering, and Coastal Erosion.
Inverts a height field along its X and/or Z dimension, and/or inverts its altitude values.
Quantizes a height field into a number of hard steps. Good for non-photorealistic landscapes. With a little masking and blur, more realistic results are possible.