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Batch edit Normals?

polycounter lvl 5
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Pioldes polycounter lvl 5
Hi there! I'm currently trying to get a huge number of grass planes to shade properly. Basically, I edited the normals of the original patch of grass so that all vertices normals would face up. It shaded good so I decided to paint that mesh on my ground mesh with the 3ds Max paint object tool.

My problem is that the mesh normals are now in chaotic directions, completely messing up the lighting when I render it out. Is there a way to make all vertices normals point towards a specific direction?

I tried using the Edit Normals modifier and pressed the Average option. It worked, all the normals are now facing the same direction, but it's not the one I want!

Anybody has any ideas?

Thanks! :)

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