<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">In that case, let's start with the basic problem set-up.<div>Before, you described your problem as follows:<br><div><div><br><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; font-family: Helvetica; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; font-size: medium; "><blockquote type="cite"><div><div class="h5">I'm using the<span class="Apple-converted-space"> </span><b>BSplineScatteredDataPointSetToImageFilter<span class="Apple-converted-space"> </span></b>from the Insight Journal. However,<br>I cannot find the correct parameter in order to make the filter work and does not crash during the evaluation.<br>I'll have scattered 3-D points over time and I want to fit a 4-D Bspline field to that points. Afterwards I want to evaluate the Bspline on a dense volume grid to one time step.</div></div></blockquote></span></blockquote></div></div></div><div><br></div><div>What do these scattered 3D+t points represent? </div><div>Is it a curve, a time-varying scalar field, or something</div><div>else?</div><div><br></div></body></html>