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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by spawelcz[/i] [br]Hello everyone, I've got a problem concerning the surfaces when plotting a 3D chart (I've already searched for this problem but I've found nothing useful). The problem is that Origin creates surfaces where there should be none (see image). [img]https://my.originlab.com/ftp/forum_and_kbase/Images/3d%20plot%20270121.jpg[/img] I've marked the relevant regions in the picture. For these regions there are no values in my data sheet so they should be white (or non existing), but they still appear when plotting the data. Other types of 3D plots do not work either. It seems like Origin creates mesh grids between different data points and I don't know how to prevent his. Thanks for your help! Origin Ver. and Service Release (Select Help-->About Origin): Origin 2021 Operating System: Windows 10 [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.