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   Ive a 3D drawing that includes over 21000 lines.
I want to flatten it.
Its a dwelling.
Previously I've exploded everything generally 2 or 3 times so every thing 'is exploded'.
Then I flatten and it generally works.
However have done the above and all stays the same, but everything is exploded!
Ive also tried going to properties to change the Z to 0 ... but this option is not available.
Does anyone have a solution to override everything and remove the Z so I can flatten this thing?

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2JimB Members Profile Find Members Posts Newbie Joined: 08.Sep.2011 Location: Australia Using: Autocad 2010 Status: Offline Points: 8	Topic: Flatten 3D 'can not' nor with Z values Posted: 12.Jul.2022 at 19:08
	Ive a 3D drawing that includes over 21000 lines. I want to flatten it. Its a dwelling. Previously I've exploded everything generally 2 or 3 times so every thing 'is exploded'. Then I flatten and it generally works. However have done the above and all stays the same, but everything is exploded! Ive also tried going to properties to change the Z to 0 ... but this option is not available. Does anyone have a solution to override everything and remove the Z so I can flatten this thing?
	JimB

philippe JOSEPH Members Profile Find Members Posts Senior Member Joined: 14.Mar.2011 Location: France Using: AutoCAD Mechanical 2017 Status: Offline Points: 1426	Posted: 13.Jul.2022 at 10:43
	Hello 2JimB, if you want to flatten a 3D solid you have various options : -1- Do a FLATSHOT with or witout the hidden lines and you will keep intact you 3D solid. Eventually do a BLOCK of your 3D solid and copy + rotate it in all the positions that you want so that you have all the 2D views when FLATSHOTening it. When setting the properties of the flatshot you will select a color and line type for your hidden lines for example green and hiddenx2. After the FLATSHOT you will erase the intities in double with an OVERKILL with the good settings and on each layer separately. -2- Do a copy of your solid, explode the copy and try to flatten all the entities. When selecting entities and the openning the properties pannel ( Ctrl+1 ) you will only be abble to act on entities of the same kind that's to say : only lines or only arcs + circles, etc... Please tell us if this helped or not. Edited by philippe JOSEPH - 13.Jul.2022 at 10:49

philippe JOSEPH Members Profile Find Members Posts Senior Member Joined: 14.Mar.2011 Location: France Using: AutoCAD Mechanical 2017 Status: Offline Points: 1426	Posted: 13.Jul.2022 at 10:46
	Found this on the internet with : autocad move everything to z 0 Use the FLATTEN command to change the Z values of all lines, arcs, and polylines to 0. 1. Turn off or freeze any hatch layers with hatch patterns so they are not included in the selection. 2. Type FLATTEN at the command line. 3. Select all objects and press the Enter key. 4. Type N for No when prompted to remove hidden lines. I do prefer a lot the FLATSHOT command.

philippe JOSEPH Members Profile Find Members Posts Senior Member Joined: 14.Mar.2011 Location: France Using: AutoCAD Mechanical 2017 Status: Offline Points: 1426	Posted: 13.Jul.2022 at 21:51
	Eventually see my AutoCAD file : ORTHO-TO-ISO_01_B.dwg in the CAD/BIM Block library about the FLATSHOT command.

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Flatten 3D 'can not' nor with Z values