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Sharpen enhances the edges and small structures of a terrain by making them more prominent.

Use sparingly. High values can create sharp artifacts on your terrain which may cause issues on playable terrains in games, as well as artifacts in LOD generation.

Node Properties
AmountThe amount of sharpening to be applied to the structures.

Enable Parallel ProcessingEnable multi-CPU processing of the effect.
Chunk SizeThe chunk size into which the image is divided for processing.
Edge BlendingThe percentage of blending between the edges of neighboring chunks. Higher values require more memory and processing time.

If you see grid-like artifacts in your output, use higher values for Edge Blending. If that does not help, try increasing Chunk Size. If either does not help, you can disable Parallel Processing. This may result in slower builds, but the result will be accurate and error free.