<html><head><meta http-equiv="Content-Type" content="text/html charset=iso-8859-1"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">v.set_parameters(solid_levels = [(3.5, 0), (5.1, .5), (10, 1.0)])<div class=""><br class=""></div><div class="">The pairs are map value and scale for brightness and opacity (0 = completely transparent, 1 = full brightness and opaque).</div><div class=""><br class=""></div><div class=""><span class="Apple-tab-span" style="white-space:pre"> </span>Tom</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Jul 15, 2015, at 5:55 PM, Dougherty, Matthew T wrote:</div><br class="Apple-interchange-newline"><div class=""><div id="divtagdefaultwrapper" style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; font-size: 12pt; background-color: rgb(255, 255, 255); font-family: Calibri, Arial, Helvetica, sans-serif;" class=""><div style="margin-top: 0px; margin-bottom: 0px;" class="">Hi,</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">I can access threshold values from solid/volume rendering. eg:</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> from VolumeViewer import active_volume</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> v = active_volume()</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> if v==None:</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> return</div><p style="margin-top: 0px; margin-bottom: 0px;" class=""></p><div style="margin-top: 0px; margin-bottom: 0px;" class=""> levels = getattr(v, "solid_levels")</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""> t,a=levels[0]<br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class="">How can I change a threshold value?</div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div style="margin-top: 0px; margin-bottom: 0px;" class=""><br class=""></div><div id="Signature" class=""><div class="BodyFragment"><font size="2" class=""><div class="PlainText">Matthew Dougherty<br class="">National Center for Macromolecular Imaging<br class="">Baylor College of Medicine<br class="">===========================================================================</div></font></div></div></div><span style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; 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