Does blender have this tool : merge every vertices at certain distance point Hi i can do this with single command in Modo, but hard to find the sama function in Blender. Can anyone help ?
pls see the attachment , i have 8 vertices and i want to merge so the adjacent vertex will blend together , to say to become 4 vertices. The mege vertex in blender will merge them all together become 1 single vertex. Or i have to do it for every 2 vertices and repeat the same process. Look, this is just the simple example. We may easily fix this using other method like dissolving edges etc. So here's the real case : I have a head model which is very high detail polygon. There's imperfections of previous edit , so there's some vertices which is look like single vertex but if i zoom it really close , i found 2vertices (also can be 3 or more) that are really close to each other . The problem is it happen sporadically randomly spread acrross the model. I can't inspect one by one as it's hundreds of poly. 

So in modo i have a very handy tool that can fix this in single click. WHere it scan the overall model and find each the adjacent 2 or more vertices (at the treshold we can set ) and blend them. And repeat the process automatically until all vertices is fixed.

In Blender , i can't find that tool. So i have to find it myself and merge them. Can someone tell me where is this tool ?
It's called remove doubles and accessible through the Specials Menu: W > remove doubles. You can adjust the merge distance after applying the operation in the tools panel. 


Select the geometry in question (or all geometry with A).
Remove double through the W specials menu.
Adjust the merge distance if needed.




From the manual:


  Remove Doubles is a useful tool to simplify a mesh by merging the selected vertices that are closer than a specified distance to each other. An alternative way to simplify a mesh is to use the Decimate Modifier.


Using the decimate modifier will be not pay exceptional attention to the distance though and is in this case not useful.