Wall Preset

1. What is a Wall Preset?

A Wall Preset is a Struct that defines how a generated SplineArchitectWall actor will look. It is located in the Preset category of the SplineArchitectWall actor (Details panel).

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2. What do the Wall Preset parameters do?

Parameter	Example
WallHeight – Sets the wall height; the scale is applied to all meshes based on this value.
HeightOverride – If true, allows manually setting the wall height; otherwise, WallHeight is taken from the first element of the WallMeshes array.
WallLength – Sets the length of a wall segment; segments will be divided by this value, and meshes from the WallMeshes array will be selected based on the segment length.
LengthOverride – If true, allows manually setting the wall length; otherwise, WallLength is taken from the first element of the WallMeshes array.
CornerLength – Sets the corner length; this much is subtracted from segments to form a corner.
CornerLengthOverride – If true, allows manually changing the corner length; otherwise, CornerLength is taken from the CornerMesh.
RandomizeSegmentsBy – Randomizes the length of the segments. Can be used to add variety to the wall, as a different mesh can be selected based on the segment length, which adds variation.
WallZHandling – Specifies how to arrange meshes when Spline segments are not flat (KeepZ will maintain "Pitch" rotation at 0 and only change the mesh's Z position, FollowSpline will rotate the mesh according to the segment's "Pitch", and Skew will generate a new, bent mesh).
SkipPieces – Allows skipping or keeping certain segments (either straight or tilted).
Inset – Pushes meshes inwards or outwards from the spline by a specified distance.
OverlapPiecesBy – The amount of overlap to prevent gaps between meshes due to imperfect edges.
NumFloors – How many times to duplicate segments with a Z offset equal to WallHeight (number of floors).
WallMeshes – The main meshes for wall segments; the most suitable one is selected from this array based on segment length.
FillerWallMeshes – Additional meshes to fill gaps, preventing the main WallMeshes from stretching or shrinking.
MinFillerWallLength – The minimum length for a filler mesh; shorter meshes will not be placed.
KeepWorldScale – If true, meshes will not be scaled according to the segment, but will use their original scale.
WorldScale – The original scale of the meshes, applied when KeepWorldScale is true.
CornerMesh – The mesh used for forming corners.
CornerType – The type of corner: Straight, Bend, Chamfer, or Pipe. (Pipe will be used for pipes with a centered pivot).
OffsetBy – Offsets all meshes by the specified vector.
RandomizeLocationBy – Randomly changes the position of meshes by this vector (small values are recommended to avoid Z-fighting).
FloorSurfaces – An array of floor configurations, where each element describes the parameters of the floor surface.
PostConfigurations – An array of post configurations, determining how and where posts will be generated.
RandomisationSettings – Randomization settings that allow for random changes to the layout and transformations of meshes.
MaterialParameters – An array of material parameters that allows setting specific material parameters on certain meshes.

FloorSurfaces parameters (FFloorData):

Parameter	Example
Material – The material that will be applied to the floor surface.
AlignTo – Floor alignment relative to the main walls: Top, Center, or Bottom.
ZOffset – Vertical offset for the floor position.
Inset – Insetting the floor inwards or outwards from the wall contour.
Thickness – The thickness of the floor (extrude height).
Subdivisions – Controls the number of polygons in the floor.
BendsResolution – Sets the distance between vertices on curved corners.
UVScale – Changes the scale of the floor's UV coordinates.
FillColor – Vertex color applied to all vertices except the edges.
EdgesColor – Vertex color for the edges.
ColorBlurIterations – More iterations will blur the floor mesh's vertex colors more.
UseDelaunayTriangulation – Delaunay triangulation provides better triangulation, but edges cannot overlap. If the floor mesh isn't working, try disabling this parameter.

PostConfigurations parameters (FPostData):

Parameter	Example
PostMesh – The mesh used for generating posts.
GenerationMethod – Post generation method: OnCorners, OnSplinePoints, BetweenSegments, OnCustomPieces, Periodically, StartAndEnd.
AverageDirections – Only applicable when GenerationMethod is OnSplinePoints. Averages the directions.
PeriodDistance – Only applicable when GenerationMethod is Periodically. Sets the distance between posts.
PostOffset – Offsets the posts by a specified vector (X - along the spline, Y - inwards/outwards, Z - vertically).
AddRotation – Adds rotation to all posts.
bScaleToWallHeight – Automatically changes the post's scale to match WallHeight.
PostScale – Adjusts the post's scale.
SkipRule – Can skip posts if the segment is flat or tilted.

RandomisationSettings parameters (FRandomSettings):

Parameter	Example
RandomMeshes – An array of FRandomMeshes structs that define the rules for random mesh swapping.

FRandomMeshes parameters:

Parameter	Example
KeyMesh – The target mesh to be replaced by a random one from the RandomMeshes array (including KeyMesh itself).
RandomMeshes – An array of meshes with weights (FRandomMeshWithWeight) from which one is randomly selected. A higher weight increases the chance for that mesh.
FitRandomType – MatchScale or KeepScale - determines whether to maintain the original scale or to scale the mesh to fit into the key mesh.
Knockout – Controls how many meshes will be randomly removed (0.0f = none, 1.0f = all).
MirrorX/Y/Z – Option to multiply the scale by -1. Only works when converting to StaticMeshComponents.
Rot90 – Randomly rotates meshes by 90, 180, or 270 degrees.
Rot180 – Randomly rotates meshes by 180 degrees only.

MaterialParameters parameters (FMatParams):

Parameter	Example
MaterialApplicationMode – Material application mode: Include (only specified), Exclude (except specified), All (for all).
MaterialReferences – A list of materials to apply parameters to (when the mode is not All).
MeshApplicationMode – Mesh selection mode: Include, Exclude, or All. We can change Material parameters only on specific meshes if needed.
StaticMeshReferences – A list of meshes to apply parameters to (when the mode is not All). We can change Material parameters only on specific meshes if needed.
Parameters – An array of material parameters (FMatParam).

FMatParam parameters:

Parameter	Example
ParameterName – The name of the material parameter we want to change.
ParameterType – The parameter type: Float or Vector.
FloatValue – The float value (when the type is Float).
ColorValue – The color value (when the type is Vector).