World Editor: Terrain Creation Tool – Arma Reforger

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Before anything: save frequently. After height map importation, normal maps, terrain texture and layer maps import/generation as they are not saved to file after the operation.

Manage

Height Map

The height map is terrain altitude's information. World Editor can work with both .asc and 16-bit .png height map files. The section offers options to import, export, and rebuild the height map.

Import Height Map

This option allows to import a height map from an external source or a World Editor export.

It allows to invert in X and Z axis, importing the terrain "from right to left" (a hill being West of the terrain would be East) or "from bottom to top" (South would be North). Ticking both corresponds to a 180° terrain rotation.

The resampling heights option allows to override the terrain's altitude range by linear interpolation. It is required for png import as the png format only holds relative

Example

Original (-10 to +10m range)	-10	-5	0	1	5	10
Imported (0 to +100m range)	0	25	50	55	75	100

Export Height Map

The Base/Modified option targets the terrain's height map - either the base terrain one, or the one modified by e.g road generators and other entities that edit terrain through script.

Generate Normal Map

Allows to (re)generate the terrain's normal map. Normal map interpolation settings (minimum and maximum angle for vertex interpolation) are only available when the Interpolation Mode option is set to Auto.

Satellite Map

Import satellite map

This imports a satellite map for the terrain, used for long-distance view.

Surface Map

Rebuild terrain materials

Rebuild terrain materials must be run after each layer map reimport. This option is separated in order to be able to import multiple layers then rebuild terrain materials.

Tile Map

The Tile Map is an overhead map of the terrain tiles.

Controls

Hold to drag the map around.

🚧

TODO: this must be updated.

Sculpt

Common values

Strength: strength of the effect - range 0..500

Height (in Flatten mode): wanted terrain's absolute height

Radius: radius (in metres) range 0..200

Falloff: the "cone/cylinder" slope ratio (see below) - range 0..100

Angle: the effect angle - range 0..360

Common Controls

Controls	Effect
⇧ Shift + Mouse up ⇧ Shift + Mouse down	Set strength/height
Ctrl + Mouse up Ctrl + Mouse down	Set radius
Ctrl + ⇧ Shift + Mouse up Ctrl + ⇧ Shift + Mouse down	Set falloff
Ctrl + ⇧ Shift + Mousewheel	Set angle

Sculpt

raises terrain according to Strength.

Alt + lowers the terrain.

Flatten

Sets the terrain to a defined Height. Space picks the height of the current terrain position under the cursor.

Smooth

Softens edges.

Noise

Generates Perlin-based terrain noise

Linear	Smooth	Sphere	Inv-Sphere

Round	Rect	User
		shown shape is identical to Rect Falloff does not impact the result Looks into the Data\Brushes directory

Falloff (small)	Falloff (medium)	Falloff (large)

Paint

A specific terrain tool used for painting surface materials on terrain ground.

• Paint tool is used for painting surface materials on a terrain ground with an adjustable brush. All paint brush properties can be set in the same tab.
• Information where each surface material is painted is stored as a mask inside game files upon saving a project. However, it is possible to both import and export each surface's mask in a .png file.
• As of Arma Reforger v0.9.5 there is a limit of 5 surfaces per block for a terrain.

Feature	Screenshot	Description
Basic Brush Settings		Show diagnostics for block under cursor – this option enables a simple surface layer list per block tab in World Editor viewport when using Paint tool and hovering over terrain. Information about block under cursor will be shown. Useful as an overview to manage surfaces in multiple blocks efficiently while painting. ⓘ See the Sculpt section above for more information. Strength range: 0..40 Strength of the brush. ⇧ Shift + MouseUp/⇧ Shift + MouseDown to adjust. Radius range: 0..200 Radius of the brush. Ctrl + MouseUp/Ctrl + MouseDown to adjust. Falloff range: 0..100 Fadeout of the brush. Ctrl + ⇧ Shift + MouseUp/Ctrl + ⇧ Shift + MouseDown to adjust. Angle range: 0..360 Rotation of the brush – useful for rectangular or user brushes.
Brush Shape and Type		Brush shape – Linear/Smooth/Sphere/Inverted Sphere – these options define the style of painting, icons next to these tabs work as an indication what each option provides. Brush type – Round/Rectangle/User. User brushes are loaded from root/Brushes (i.e. root/Brushes/blot.png).
Surface Layer List		Surface layer list – A simple drag & drop list of surface materials. These can be dropped from either Workbench or World Editor's Resource Browser. The very first surface layer is always used as default and while it can not be removed or imported, it can be changed to a different one. In this scenario, Grass_03 is used as a default surface. When masks are stored in game files, they are all merged together. Any information that is remaining from the resulting merged mask is used as default layer.
Basic Painting	🚧 TODO: this must be updated.
Extra Surface Layer Operations		Change layer's material... – Change surface material to a one not included in the list. Clear surface layer – selected surface layer's mask will be cleared with default surface layer. Fill surface layer (clear other) – selected surface layer will fill the entire terrain ground, replacing every other surface layer. Remove surface layer – removes surface layer from the list. Priority surface mask import – will automatically import mask of a selected surface layer. Priority surface mask import... – will import a specific surface layer mask. Export surface mask – will automatically export mask of a selected surface layer. Export surface mask... – will export a specific surface layer mask. A simple batch import and export feature for surface masks is also available – these options work with masks from all surfaces at once. All surface masks are in a .png format and for the best results a predetermined sizing should be followed – this information can be found in the Info & Diags tab (section below).

Info & Diags

This tab contains useful info about blocks and their surface layers. These diagnostics also allow either manual merging or replacing of surface layers in specific blocks.

Step	Screenshot	Description
Block and Pixel Under Cursor Diagnostics		In the lower part of the Info & Diags tab, there is an extra information about blocks containing painted surface layers. While in Info & Diags tab, you can press Ctrl+X in World Editor's viewport to visualize surface layers painted on the terrain ground. Diagnostic colors are set in each surface layer. Block Live (under cursor) – diagnostics will describe the block actually under cursor in World Editor's viewport. If the tile is clicked then this checkbox becomes unticked. Camera auto-align – when a block is selected, camera will automatically align to it. Coordinates – it is possible to input specific tile coordinates and have camera automatically moved to their location. Below is a list of specific pixel coordinates of height map, satellite texture and surface mask. As each has a different size, the coordinates are different. Listed coordinates are Top-left coordinates/Bottom-right coordinates. Percentage list determines the mask coverage of a surface layer in a selected block. These percentages work with surface layer mask blending as well, meaning that the total value can be up to 500%. Pixel Under Cursor Coordinates – same as above. The Pixel Surface statistics list shows surface layers per pixel. The range is set from 0 to 255 (black - white) and always add up to 255. It is possible to determine exactly which pixel contains what surface layers through this data.
Basic Surface Diagnostics		Merge – merges selected surface layer with already existing one. Replace – replaces selected surface layer with a layer not present in selected block. A 3x3 grid is an indicator of selected block and its neighbours. The orientation is based on cardinal directions. Green – there is a free slot for that surface layer. Yellow – selected block. Red – the limit of 5 surface layers is reached in that block.
Surface Layer Merge or Replace Operations	🚧 TODO: Add graphic element?	Select a block in which you want a surface layer merged or replace. Select specific surface in the percentage list by right-clicking on it. Pick between either Merge or Replace options. If Replace is further expanded, pick a surface layer which you want to replace selected one. If there is a red square in the 3x3 grid, the 5 surface layer limit is reached in that block and it needs to be processed by further merging surface layers there to empty the slot.