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enter image description heretext engraving

The displacement map is an animation of the letters being engraved in the metal. The animation itself works just fine. The only problem is the edges of the letters. How can i get them straight instead of this?

-I tried a higher amount of subdivisions but that doesn't seem to work (blender crashes). -I am also pretty sure it has got nothing to do with the animation i made in after effects.

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    $\begingroup$ Do you have Displacement modifier on top of your modifiers stack? $\endgroup$ – Paul Gonet Sep 13 '16 at 14:20
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    $\begingroup$ Increase the subdivisions and also check if their value for "Render View" is set at least to the same amount than it is in 3D view. $\endgroup$ – metaphor_set Sep 13 '16 at 14:30
  • $\begingroup$ @PaulGonet , I only have 1 modifier and that's the displace modifier. $\endgroup$ – nicholas Sep 13 '16 at 15:57
  • $\begingroup$ @metaphor_set, If I try to open the subdivisions 'tab' ( by going into edit mode> 'w' > subdivide) blender crashes. I think the last image I uploaded explains why. $\endgroup$ – nicholas Sep 13 '16 at 16:05
  • $\begingroup$ Instead of a "normal" subdivide I'd always go with a Subdivision Modifier or a Multiresolution Modifier. They won't change how subdivision works but at least they are non-distructive as long as you don't apply them. Nice clean letters could also be done by importing them as curves and using the extrusion method. It's a little more work but the result is much better imho. $\endgroup$ – metaphor_set Sep 13 '16 at 16:26

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