<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">As you define the disks, you can make the inner one thicker, which will guarantee that it's color will show through and not be "mixed" with the outer one's color.<div><br></div><div>--Eric</div><div><br></div><div><div><span class="Apple-style-span" style="border-collapse: separate; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 16px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; -webkit-text-decorations-in-effect: none; text-indent: 0px; -webkit-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="5" style="font: normal normal normal 16px/normal Helvetica; "> Eric Pettersen</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="5" style="font: normal normal normal 16px/normal Helvetica; "> UCSF Computer Graphics Lab</font></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="5" style="font: normal normal normal 16px/normal Helvetica; "> <a href="http://www.cgl.ucsf.edu">http://www.cgl.ucsf.edu</a></font></div><br class="Apple-interchange-newline"></span></div><div><div>On Sep 24, 2012, at 9:17 AM, Bala subramanian wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Friends,<br>I want to draw concentric circles of increasing sizes around the<br>protein. To achieve this, i used the 'define plane' option to draw<br>disk choosing I three reference atoms and drew the disks of increasing<br>sizes and choose two different color for the inner and outer disk.<br>Since the reference atoms are the same. If i change the color of the<br>bigger disk, i get a weird appearance of the inner disk. I dnt know<br>how to resolve this problem.<br><br>I would like to know if i can do something like making the disk<br>transparent/removing the fill color of the disk.<br><br>thanks,<br>Bala</div></blockquote></div></div><br></body></html>