Extrude Along Spline in 3dsmax In this short tutorial, I demonstrate how to use the Extrude Along Spline function in 3Ds Max to extend a 3D model — such as a road or bridge — along a custom spline path. This method allows you to continue geometry along curved lines with precision and control. I start by selecting the end polygons of the 3d model, then use Extrude Along Spline to follow the spline path. By adjusting the interpolation steps, I ensure smooth curves that follow the line naturally. T

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