Horizon — PBR Workbench for Unreal Engine

Source

Drop an image, or

Tiling pre-pass

Make source seamless before generating

Blend width 48px

Applies on next Generate. Hides the original edge seam by moving it to the center and cross-blending — a quick fix, not retouching.

Normal N

Strength 3.0

Smoothing 0px

Export convention

Unreal Engine expects DirectX-convention normal maps by default. Switch to OpenGL only if you're exporting elsewhere.

Height H

Invert

Black point 0.00

White point 1.00

Ambient occlusion R

Intensity 1.00

Sample radius 24px

High-detail sampling (slower)

Estimated from heightfield horizon angles in 8–12 directions — real cavity shadowing, not an inverted-height blur. Radius/quality apply on next Generate.

Roughness G

Base value 0.50

Detail break-up 1.5

Driven by local micro-contrast — a textured starting point, not a measured value.

Metallic B

Base value 0.00

Detail intensity 2.0

Detail is driven by local highlight contrast — bright flecks standing out from their surroundings (mica, filings, worn-through patches) read as more metallic. Still a starting point, not a measured value; paint a real mask later for hard material boundaries.

Export

Asset name

Unreal import: Compression = Normalmap for _N; Masks (no sRGB) for _H and _ORMH, sRGB unchecked on both. _ORMH packs AO·R, Roughness·G, Metallic·B, Height·A — break out the Texture Sample's Alpha pin explicitly to reach Height (RGB-only nodes ignore it). In the ORM+H preview, checkerboard showing through is the alpha/height channel, not actual transparency.

Load a texture or try the sample relief to begin.

Tiling mismatch—

Ambiguous pixels—

Noise spikes—

Resolution—