Hi, the following part is a corner bracket I've made which looks really weird in preview mode. Some of the material is see-through. When rendered it looks allright. Preview: <http://forum.openscad.org/file/n10452/preview.png> Render: <http://forum.openscad.org/file/n10452/render.png> I'm running 2014-12-04 win 64bit version. Here is the script that creates the part: //For KR33 Mini CNC //Frode Lillerud, 08.des.2014 height=20; width=20; depth=(2*25.4); screwdiameter=6; difference() { translate([0, depth/2, 0]) rotate([90, 0, 0]) linear_extrude(height=depth) difference() { polygon( points = [ [0,0],[width,0], [width,1], [1, height], [0,height] ], paths = [ [0,1,2,3,4] ]); polygon( points = [ [3,3], [width-5, 3], [3, height-5] ], paths = [ [0,1,2] ]); } union() { //The four screwholes translate([width/1.5, depth/4, -1]) cylinder(height*2, r=screwdiameter, $fn=20); mirror([0,1,0]) translate([width/1.5, depth/4, -1]) cylinder(height*2, r=screwdiameter, $fn=20); translate([-1, depth/4, width/1.5]) rotate([0, 90, 0]) cylinder(height*2, r=screwdiameter, $fn=20); mirror([0,1,0]) translate([-1, depth/4, width/1.5]) rotate([0, 90, 0]) cylinder(height*2, r=screwdiameter, $fn=20); } } -- View this message in context: http://forum.openscad.org/Model-not-previewing-correctly-in-2014-12-04-win-64-bit-version-tp10452.html Sent from the OpenSCAD mailing list archive at Nabble.com.

On 12/09/2014 06:54 PM, Scalpel78 wrote: > Hi, the following part is a corner bracket I've made which looks really weird > in preview mode. Some of the material is see-through. When rendered it looks > allright. > Try adding convexity = 2 to the linear_extrude(). ciao, Torsten.

Thanks, that fixed it :) -- View this message in context: http://forum.openscad.org/Model-not-previewing-correctly-in-2014-12-04-win-64-bit-version-tp10452p10457.html Sent from the OpenSCAD mailing list archive at Nabble.com.