Terry Smith Posted April 23, 2019 Share Posted April 23, 2019 These lines are appearing in my openGL renders at certain zoom distances from the drawing. I'll be zooming in and then all of a sudden they'll appear, then they'll go away. "well why don't you just zoom until the lines go away?" While that is a workaround, the lines appear while the camera is "sitting" in a seat in the back row of the theatre. Quote Link to comment
zoomer Posted April 24, 2019 Share Posted April 24, 2019 You have Lines Option on and nearly perpedicular view to the View ? You could try background OpenGL and Hidden Line on top in a SL Viewport. But as far as I know HL has also problems with "1 Point Perspectives" (called Central Perspective ?) I assume the wired Lines would go away as soon as you start to rotate your view a bit sideways, so that it will be a true 2-3 point perspective. May not help you anyway ... Quote Link to comment
EAlexander Posted April 24, 2019 Share Posted April 24, 2019 (edited) Usually this indicates overlapping geometry. Check if you have intersecting objects or doubled up objects. When two solids occupy the same x, y, z space, VW struggles to know which to show, so you get that look in open GL. Edited April 25, 2019 by EAlexander 1 Quote Link to comment
Christiaan Posted April 25, 2019 Share Posted April 25, 2019 It does often indicate overlapping geometry, so it could be that, but I've also experienced this sort of thing as a graphic glitch. If so it may go away after a restart. Quote Link to comment
RussU Posted April 25, 2019 Share Posted April 25, 2019 11 hours ago, EAlexander said: Usually this indicates overlapping geometry Yep, I agree... known as z-fighting. Can you look at one more thing though? I've noticed some oddities in open GL drawing when your geometry in a long way from the internal origin. Set a 3d locus to 0,0,0 and then zoom to all, and see how far away you are... if it's a long way, get everything to the origin and have another look.... that might solve it. Quote Link to comment
tomhaupt Posted October 20, 2019 Share Posted October 20, 2019 RussU: (a few months later): I was having same problem on a file as the above folks. I checked your suggestion and it did the trick. I was stymied because I have other files that worked just perfect. As it turned out I had imported some symbols or objects from other files of vastly different scales and some of them ended up in 'outer space'. In addition to the striated lines, I had very poor OpenGL rendering. Losts of my object edges had wavy/scalloped edges. Your solutions solved both problems. Kind regards, Quote Link to comment
Thomas Hanson Posted December 5, 2022 Share Posted December 5, 2022 I had a similar issue - noticed in Open GL settings I had the crease angle set to 70. Changing it back to 0 got rid of the lines. Quote Link to comment
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