How select 2 surfaces in this case ?

There is only one surface! The twice "Separate" Delete don't work...I must miss something! :)

Hi Pilou, sorry I was working on this spot here where there are 2 surfaces:


For the area you are working on with just one surface along those edges, select that one surface and use Edit > Separate so it is not joined to the main piece anymore, then select all edges and use Delete. The easiest way to select all edges is to select one edge and then do Ctrl+A.

After the untrim when you then go to select edges you should see there is just one long edge there now.

- Michael

OK i have find that I miss! :)
It was "select all edges"!
For me i have understood "all edges" who are "all edges" not merged on my "bottom" face! (so "one edge" of the surface)
:)

Now with selecting all "4 edges" of the surface all works fine! :)

...but maybe my method by kill the surface and redraw by a Sweep with the "3 good edges neighbour" is more speedy...

WOW!! thank you so much guys for all the help and sorry for late replay. i will try everything you did here. really interesting thank you one more time.

快捷键代码：script: /* Select edges v1.4 */ var gd=moi.geometryDatabase, so=gd.getSelectedObjects(); function ss(o,v){o.setProperty("selected",v)} function sl(o){ for ( var i=0; i<o.length; ++i ) o.item(i).getEdges().invertProperty("selected");} gd.selectLoop(); sl(so.getFaces()); sl(so.getSolids()); sl(so.getOpenBReps()); sl(so.getSingleFaceBReps()); ss(so.getBReps(),0); ss(so.getFaces(),0);

环选边，如图1-2和3-4两种选择模式，选择完成后可以合并（JOIN）成曲线，重新构面，就没有破碎的边缘了。

15分钟的事情，构造思路的问题。





仅选中这些面，反选（invert）隐藏（hide）掉其他的一切，并将这些面涂上其他颜色，方便一起选择。

单独加厚（shell）一个面并倒角。




删除背后以及侧面的面，完成。

Hi Suiyan,

Merge and Join are two different things. It sounds like maybe you want Merge rather than Join. There is not a button for Merge. Hit Tab and then type Merge to merge curves.

But, it is usually a bad idea to merge edges of a cube. If you do not like seeing the edges a better way is to hide them by clicking the eye icon like this:



- Peer

谢谢，我知道该怎么做。我的图片所演示的是循环边快捷键的效果（中国的使用者都这么称呼这个命令，意思如图片所演示的，快速选择面的轮廓的所有边缘或一段相连接的所有边缘）。我并不是分不清合并（merge）和连接（join）的区别，而是对于更多段更小的边merge命令的效果并不理想，并不能完全合并成一条边。

我的图片演示是对albehany的情况，将所有细小的边缘连接（join），成为一条曲线，再用网格曲面（network）进行修补会非常顺利。