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I cant seem to get rid of the ripples when making holes in my model. The hole on the right has loop cut and I tried creaes. Both hold have this weird small flap that keep showing up.

Here is the file if you want to look.model with holes

enter image description here

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    $\begingroup$ There's just not much you can do to combat tris and ngons. There are many threads on BSE that address this. blender.stackexchange.com/a/84539/38953 $\endgroup$
    – bertmoog
    Commented Aug 11, 2017 at 2:09
  • $\begingroup$ In order to fix this you are going to need to clean up your mesh. There are a lot of ngons and tris all over the place. You mainly want to be working with quads when modelling things. Since it looks like you're working with boolean modifiers to cut those holes I'd recommend watching this tutorial by Andrew Price: youtube.com/watch?v=WxMwa0njGSM $\endgroup$
    – masterj2001
    Commented Aug 11, 2017 at 2:27

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As stated by @bertmoog this is result of bad topology. I will not elaborate on that as you have enough information in the link in comments, but I will show you how your topology should look like if you want to use Subdivision Surface modifier.

Final result:

Final

I don't know how much do you know about modeling so I'll be brief, and if you need more info - ask in comments.

I've started with simple Plane with Mirror modifier on X and Y axes, extruded it upwards along your mesh. After that I've Subdivided it once and used Inset on top face. Then with LoopTools addon I've created Circle from vertices created by Inset, extruded it down and filed with Grid Fill, to achieve hard edges I've used Bevel Tool (not modifier).

Keywords marked with Bold should be enough for you to learn about this simple technique.

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  • $\begingroup$ Thank you for your guidance... I'm beginner with lots to learn. Back to blender now. $\endgroup$
    – Dean Williams
    Commented Aug 11, 2017 at 3:59
  • $\begingroup$ @DeanWilliams If I may advice you, at the beginning don't take shortcuts. Learn proper method first, and after that try to use tools like Boolean. Also check here: topologyguides.com $\endgroup$
    – cgslav
    Commented Aug 11, 2017 at 4:07

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