@Minjae_Jeong It would really help to know whether some or all of these faces are flat, or if there are any curves involved here. Is this on a cylinder? Do a little unzoomie for me.
planarity is a new concept for me but while checking the support loops... i realised this deleting the two faces solved the problem. but i guess 8 edges were not enough for the hole, i had to increased the subdiv iteration from 2 to 3.
I guess any grid, elevated with for example a heightmap, splitted by faces, scaled by individual faces, extruded and maybe merged will do.. Blender even does have a paper model exporter.. which may be a bad idea for this kind of model...
@ikokane to do the last step, select the text faces, hold ctrl, and click the vert sub-object mode to convert the face selection into a vert selection. then hit connect.
Well.. i wonder what makes you think so.. also Blenders does have this feature to check the distortion of a mesh to check which polygons aren't coplanar.. and as long as someone keeps extruding and scaling in a "proper" way.. i think there is no problem.. (additional mesh to show distortion.. and pulling the minimum to 0…
pr1mus Typically I just lay a circle template on the face I want to have the hole in, delete the face itself, then bridge the outside of the template to the surrounding geometry. It works for most holes I need to punch into stuff. And voila: