OBJECTIVE : Import a rectangular box (Panel) from Second Life and use edge loops to cut a doorway/window through the panel, in Blender..
HISTORY : I have a rectangular box that I imported from Second Life. I've opened it and it has 9 quads per face (18 triangles). I decimated the rectangular box using DECIMATE modifier (using planar), and it resulted with each face as a single quad. I was unable to create an edge loop around the rectangle, ONLY able to put an edge on one face... So, I used SOLIDIFY modifier. That failed. I tried SOLIDIFY again from scratch and used 1.0 thickness, which seemingly allows me to create an edge loop around the object..
I. After placing 3 edge loops for a doorway, I'm unable to select individual faces without often selecting an adjacent face, too.
II. When I delete faces, nothing deletes. The object is intact, always. After continual delete operations, some faces from the new edge loops disappear, seemingly at random, without any obvious relation to what I'm trying to delete.
KEY INFORMATION :
A. If Solidify is NOT set to 1.0 thickness, I can see the faces having 3d thickness of their own, not meeting to the center - and when this happens the edge loops go around the geometry of the face and not the object - which signifies that the initial edge loop problem has not been solved with solidify at 1.0 thickness, either....
---- This is what I believe causes the issue in the first place with failed edge loops on this simple model. I believe the edges have some kind of geometry that forces edge loops to wrap around the face, INSTEAD of around the box..
B. SOLIDIFY may be falsely solving the edge loop problem, if the edge loops are STILL going around the geometry of a single face, at the thickness of the object itself.......
CONCLUSION : I have an issue with not being able to use edge loops around a simple rectangular mesh geometry to delete geometry for creating a doorway/window, because the edge loops apply only to a single face and solidify is likely not the solution because of the multiple faces being accounted for..
Due to the simple box geometry, I'm not sure why I would have difficulty with these steps on this model. It's only a box (rectangular and flat). Nothing is responding the way it should, and I've tried many things that have been suggested elsewhere throughout the internet. I only need to cut a door or window through it using edge loops. This should be a very simple operation, However on this rectangular mesh it seems IMPOSSIBLE to do. I'm not sure what to do.
I can share a copy if that's helpful. I'm not sure if there is something unique about this panel? Any help would be greatly appreciated - thank you in advance :-)