If you mean multires, go to the lowest res then press Apply Multires (in the editing panel). Or in 2.5 it's a modifier so you can just press the X in the modifier box.
In the Multires panel there's buttons for "Del Lower" and "Del Higher". So, if you go to Level 1 and Del Higher you don't have a Multires Mesh anymore.
In the Multires panel there's buttons for "Del Lower" and "Del Higher". So, if you go to Level 1 and Del Higher you don't have a Multires Mesh anymore.
Actually you'll still have a multires mesh. For example, try applying any topology-changing modifier after doing that and Blender will say "cannot apply with multires active." You have to apply the multires to make it non-multires.
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If you mean multires, go to the lowest res then press Apply Multires (in the editing panel). Or in 2.5 it's a modifier so you can just press the X in the modifier box.
Actually you'll still have a multires mesh. For example, try applying any topology-changing modifier after doing that and Blender will say "cannot apply with multires active." You have to apply the multires to make it non-multires.