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I've made all my game models and imported them, but, I am noticing frame lag and I think that it's most likely due to the fact all the squares in each model are separate. I've tried ctrl + J but the problem is when I import it into unity certain faces are missing. I've also tried recalculating the normals and that doesn't work either.

Side note: I'm very new to blender, maybe a few weeks, so any other optimization advice would be great.

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  • $\begingroup$ Try converting your quads to triangles. Game engines usually like triangles better. However, for modeling quads are better in most situations. $\endgroup$ – 10 Replies Dec 12 '16 at 11:26
  • $\begingroup$ I also tried this and it worked very well as well thanks for the advice! $\endgroup$ – Brett Micham Dec 13 '16 at 6:52
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There are several possible problems that cause the faces to disappear in Unity. The way Unity calculates normal is usually by hiding all of the weird angled faces and flipped normals. So try to:

  • Select every vertices in Edit Mode and hit 'W' to bring up Special Menu. Choose Remove Doubles to merge every overlapping vertices at the same position.
  • In Edit Mode, this time with nothing selected, you hit 'Spacebar' and then type in 'Select faces by sides', hit enter. Then hit F6 on keyboard to edit the Properties. Choose 'Number of Vertices = 4', 'Type = Not Equal To'. Now you'll see the Ngons (faces that have more than 4 edges) and probably some Tris (triangle faces) selected. You can now delete them or go and fix them one by one. Repeat this step until you can't see any Tris or Ngons selected.

Now you can try exporting your model into Unity. Hopefully this help :) otherwise, comment below and maybe post your Blend file online so I can check if anything is missing. Goodluck!

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  • $\begingroup$ hey thanks for answering so quickly ill give it a try tomorrow and see how it goes $\endgroup$ – Brett Micham Dec 12 '16 at 7:43
  • $\begingroup$ You're welcome. Goodluck on that! $\endgroup$ – Vin C. Dec 12 '16 at 7:46
  • $\begingroup$ Just tried it and it worked the exact way I wanted it too thank you so much! $\endgroup$ – Brett Micham Dec 13 '16 at 6:51
  • $\begingroup$ That's good :) glad that I helped! Happy Blending! $\endgroup$ – Vin C. Dec 13 '16 at 8:51

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