I have a 3D model from our engineering department with accurate measures of our product (format: VRML) that I want to give to a third party. The third party doesn't need an accurate model for what they are supposed to do with it. Now I want to modify the whole model with little effort to protect our technical know-how.

Does anybody know a solution in Blender to accomplish that?

I played a little bit with the decimate modifier and it looked promising. The draw back I see with it, is the disproportionate effort I have to make since I don't know how to apply the modifier on ALL faces of ALL objects in the model.

Is it possible to get a short step-by-step tutorial to get all faces modified at once?

Another question that comes to my mind regarding the protection effect: If I modify the model and export it again to the VRML-format, then the modification I made in Blender is definite/destructive in opposite to the Blender-format itself where it stays non-destructive and I can adjust the modifier again. Am I right?

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    $\begingroup$ you can setup your decimate on 1 object, select everything with A, be sure your modified mesh is active and Ctrl+L to link the modifiers from it. I think modifiers are applied when exporting, so it'll be destructive. can be a checkbox (depending on file format) $\endgroup$ – Bithur Feb 26 '15 at 13:49
  • $\begingroup$ @Bithur that looks like it may be the answer. Would you mind saying the same thing in an answer maybe with a few screen shots? Thanks $\endgroup$ – Scalia Feb 26 '15 at 16:16

Setup your decimate modifier on one of the objects.

Then, in object mode, select all objects (A) or all needed object (Shift+RMB).

Make sure your decimated object is active (different color, usually brighter orange), if it's not, Shift+RMB on it.

Use Ctrl+L to open the link menu and select "modifiers"
enter image description here

All the selected objects will now have the exact same modifiers as the active object. enter image description here

About export : modifiers are applied when exporting, so it will be destructive. There can be a checkbox (depending on file format) to apply modifiers or not.

  • $\begingroup$ Sorry but I had a lot of work and couldn't post a full answer with screenshots before. $\endgroup$ – Bithur Feb 26 '15 at 19:30
  • $\begingroup$ Thanks for the input. I tried this, but I couldn't get all objects with "A", it only selected all faces of the selected object. However, I got all objects selected with the lasso tool and used the copy-attributes-addon described here: blender.stackexchange.com/questions/319/… $\endgroup$ – Markus K. Feb 27 '15 at 9:40
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    $\begingroup$ you tried to select objects in edit mode, go in object mode (Tab) $\endgroup$ – Bithur Feb 27 '15 at 11:59

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