Anwar Posted May 23, 2017 Share Posted May 23, 2017 Tech, I have an underlay that is over 22,000 pixels wide, it is ariel imagery of a site for very large DEM file I have imported. I need to underlay it on the imported surface so I can trace all the features. However, formZ hangs and I eventually have to kill it when trying to open an underlay of this size. What are the maximum dimensions for an underlay? Thanks, Anwar Link to comment Share on other sites More sharing options...
Tech Posted May 23, 2017 Share Posted May 23, 2017 Anwar, That image is beyond massive. If you cannot shrink it to a usable size, then I would suggest cropping parts of it and then working with each individual part. Link to comment Share on other sites More sharing options...
Anwar Posted May 23, 2017 Author Share Posted May 23, 2017 I was able to shrink it to 4,000 pixels wide, and formZ took that. But what is the limit, so I can size it to as much resolution as I can get out of it? Link to comment Share on other sites More sharing options...
setz Posted May 23, 2017 Share Posted May 23, 2017 I typically break down underlays down to 4096x4096. I believe FZ up-samples all images (underlays, textures, billboards) internally to base 2 increments: 512,1024,2048,4096,etc, so, getting close to but not over these numbers will increase speed. A 4096x4096 image will be significantly faster than a 4096x5000 image which will be seen internally as 8192x8192 - 4X larger. (Tech, correct me if I'm wrong about this.) Link to comment Share on other sites More sharing options...
Tech Posted June 2, 2017 Share Posted June 2, 2017 Setz, You are not wrong Link to comment Share on other sites More sharing options...
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