heightfield_maskexpand node don't expand at the boundary

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When expand the mask, houdini don't expand at the terrain boundary.
How to fix this?
Thanks.


It seems that the heightfield_blur node have the same problem.
When blur the mask, the mask don't be a straight at the boundary.

If we have a road go across the terrain boundary, we project the road to terrain
heightfield to get a mask, and blur it, we will found that the mask have
some gap. We want blur the mask and don't have any gap.

Edited by ChenA - July 16, 2021 06:16:25

Attachments:
expand1.png (57.2 KB)
expand2.png (112.1 KB)
blur1.png (184.7 KB)

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