I want to do merging of square faces as seen in the enclosed video. In the video, z-brush is being used to do the process very slowly.
Is there a faster way to do this in Blender?
Please share screenshots or video tutorial link as I am very new to Blender.
Enclosing the obj file.
VOXELATED FORM.obj (302.8 KB)
Thanks! Quite a fast process. However, it sometimes works, sometimes it doesn’t and creates a messy group of faces.
I recorded video of what exactly happens.
Is there a way to select faces which have the same height, or like which are on the same level by some selection filter? Right now I’m selecting them manually.
Yes building a n-gon over non-coplanar faces is a bad idea… because you have overlapping “borders” so to speak… and it’s also not done in your given video…
You are not trying to eliminate co-planar there, you’re trying to make something into something else. You have a stepped section and you’re trying to make it a slope, that will not happen automatically.
Best case for that, delete the enclosed polys then try bridging the edge loops.
I don’t want to make a slope at all. In the video, I was illustrating what exactly happens when I try to do the process fast. I only want the polygon count to get reduced and I have horizontal faces with larger surface area.
Co-planar / limited dissolve can’t work effectively in this instance on things with right angles, as it doesn’t know what to make of the geometry. However, if you select co-planar with an angle of say 1 degree, or choose select->linked flat faces, then limited dissolve should give reasonable results, I use this technique a lot in my workflow. You may need some tidy up of edges later if you want “nice” connecting edges, but that depends a lot on the mesh i’ve found.
How to apply a filter of selecting faces with an angle of say 1 degree or less than that? Please share screenshots or step by step short video.
Co-planar, it’s a “threshold”, the lower the number, the tighter the criteria, so say you select co-planar, but it selects faces on areas below and above what you want. Press F9 to open up the select similar settings and drop the value for example from 0.01 to 0.001.
Linked flat faces, the value is called sharpness, increasing or decreasing the angle affects the selection.
Same goes for when using limited dissolve, the max angle controls how faces will be dissolved, a higher angle and more faces are taken into account.
Be aware though, these options are only available at point of the command, not later on, as with all things really.
Video: https://drive.google.com/file/d/1_2spujRrP9Cbrn8526HrWmL6rhPI4m1t/view?usp=sharing
I’ve read over this and I am not sure if you want the resulting faceareas to be squares shapewise or if you just want to simplify coplanar areas as much as possible.
But the latter is exactly what limited dissolve is all about. Just be sure there is a limitation when the simplification would contain enclosed holes inside the ngon. Then some edes will remain and could be placed better, thats what colkai demoed.
But in case you didnt try, that would be just
If you want perfect squares you will more careful manual selections and make use of the other option in the delete menu “Dissolve Vertices”
Awesome. Thank you so much 
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That did it! However, I have to make selections multiple times while holding my shift button in order to select all the faces. What am I doing wrong?
Thanks for this video. 
I’m not looking for this solution but this gave me lot of good techniques that I can use in other modeling processes in Blender.
Use Menu-> Select->All or Shortcut A or make your selection in wireframe mode or make use of one of the available addons that make a more comfortable select through possible in blender, like this one
Awesome. Will surely check it out. Thanks.
