Paint FX Grass Flipped on Curve

[depleteD]

tube direction = along normal on the brush attribute
then have the normal direction on strokeshape attribute y=1

[Duncan]

Curves don't have normals, but pfx will derive a normal based on the local curvature. Note that this becomes undefined where the curve becomes straight. Also little back and forth wiggles can cause the sense of curvature direction to twist in undesirable ways. Thus one needs to specify a fixed , or constant, normal direction on the stroke as described by depleteD. Painting on the groundplane automatically enables the up direction normal, but assign brush to curve does not.

Note that a curve on surface, by constrast, does have a well defined normal. If one doesn't have a surface, one could potentially extrude the curve or connect to a similar one to create a strip with a well defined normal. One could then make a curve on this surface and use it to provide a good normal for the stroke( in cases where a constant normal direction is not sufficient ).

Duncan

[Slurry]

Thank you very much for your replies and help with this.

I had the TUBE DIRECTION for the Brush set to along normal but I didn't know about the USE NORMAL in the stroke tab.

Thanks again guys,

Art

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