Hi! I don't understand how to make motion blur effect on ornithopter blades (from Dune) without creating animation (Arnold renderer).

Now it creates a solid blur on the entire surface of the blades. And I need it to be less at the base than at the end of the blades.

The code is in Attribute Wrangle:
v@v={0,1,0};
v@v*=chf(“v_mult”)* @mask;

In your screenshot we can't see the parameters and what's going on in the geo spreadsheet.
If you upload a file, we can have a look.

Maybe attrib wrangle is set to detail (instead to vertices, I suppose)?

If your v attribute looks good when visualized in the viewport, make sure that you render your object with Velocity MB

Also if you need curved MB you may want to create additional v@accel or v@force attribute and use Acceleration MB

https://help.autodesk.com/view/ARNOL/ENU/?guid=arnold_for_houdini_geometry_ah_Motion_Blur_geometry_html [help.autodesk.com]