Let's say I used the subsurf mod to 5 and applied it, but later want to it not subsurf-ed, let's assume that i didnt do a save either.

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    $\begingroup$ Try Decimate Modifier. $\endgroup$ – brockmann Oct 28 '17 at 23:05
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    $\begingroup$ Never apply modifiers unless strictly necessary, and if you do save a copy of the original . $\endgroup$ – Duarte Farrajota Ramos Oct 28 '17 at 23:13

I doubt there is a way to restore the original mesh (with the exact topology) after applying subsurf modifier. What you can do is use an Un-Subdivide option of the Decimate Modifier (expect some loss in detail though). General rule is if your applied subsurf level was set to 2 you set the unsubdivide level to 4 etc. In my case I set the Un-Subdivide level to 10 on a model with the level 5 subsurf applied. enter image description here enter image description here Note: After appling Decimate modifier you may go to Edit Mode, select all the vertices (A) and hit Alt+J to get rid of some tris to make the topology even more similar to the original mesh.

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  • $\begingroup$ Thank you...i did saw that modifier, but never knew how to use it...thanks again.. $\endgroup$ – Akash Digumber Oct 29 '17 at 6:15
  • $\begingroup$ you can try to project your decimated mesh onto your lvl 5 subdiv mesh to regains some of that lost detail $\endgroup$ – J. Brosch Oct 30 '17 at 11:56

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