I haven't worked much in GIMP, but my first impression is that it's not exactly very intuitive or user friendly to say the least. Anyway, I think I was able to figure out how to fix your normal map.
Add an alpha channel if you haven't already, and then go to Colors > Components > Decompose. Pick RGBA in the Color Model dropdown and make sure the "Decompose to layers" box is checked. This should open a new image which is basically your old image, except the channels have been converted into layers which you can now manipulate. Paste the red layer into the alpha channel. It will create a floating selection which you will have to anchor with Ctrl + H. Make the rest of the adjustments to your red and blue layer, and then go back to Colors > Components> Recompose. It should change your layers back into channels and you will (hopefully) have a normal map ready to import into the SC2 editor.
Now, why you can't just copy from one channel to another in GIMP is beyond me.
As for your normal problem, I can't really think of a solution other than manually flipping faces if the Normal modifier didn't work. But you should be able to apply the Normal modifier which will allow you to export.
I haven't had much opportunity to play around with the 3ds Max export plugins yet, but the artifacts/holes you're experiencing look like they're being caused by inverted face normals. I suggest you try to add a "normal" modifier and click the "unify normals" button. If that doesn't work, then it's probably a problem with your geometry. Make sure all of your faces share common edges and that there are no double vertices.
Hey there. I hope I'm not too late to answer your question. It seems as though the animations for the civilian models are stored in a separate .m3a file. They are added to the model in the data editor with the Animations (Required) field. As far as I know, .m3a files aren't currently supported by the m3 plugins. Have you tried adding the attachment and importing into the editor like you normally would, just to see if it works? I'm not sure if adding an attachment would mess up the animations in the .m3a file or not.
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I haven't worked much in GIMP, but my first impression is that it's not exactly very intuitive or user friendly to say the least. Anyway, I think I was able to figure out how to fix your normal map.
Add an alpha channel if you haven't already, and then go to Colors > Components > Decompose. Pick RGBA in the Color Model dropdown and make sure the "Decompose to layers" box is checked. This should open a new image which is basically your old image, except the channels have been converted into layers which you can now manipulate. Paste the red layer into the alpha channel. It will create a floating selection which you will have to anchor with Ctrl + H. Make the rest of the adjustments to your red and blue layer, and then go back to Colors > Components> Recompose. It should change your layers back into channels and you will (hopefully) have a normal map ready to import into the SC2 editor.
Now, why you can't just copy from one channel to another in GIMP is beyond me.
As for your normal problem, I can't really think of a solution other than manually flipping faces if the Normal modifier didn't work. But you should be able to apply the Normal modifier which will allow you to export.
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Hey, is that Fluttershy?
I haven't had much opportunity to play around with the 3ds Max export plugins yet, but the artifacts/holes you're experiencing look like they're being caused by inverted face normals. I suggest you try to add a "normal" modifier and click the "unify normals" button. If that doesn't work, then it's probably a problem with your geometry. Make sure all of your faces share common edges and that there are no double vertices.
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Hey there. I hope I'm not too late to answer your question. It seems as though the animations for the civilian models are stored in a separate .m3a file. They are added to the model in the data editor with the Animations (Required) field. As far as I know, .m3a files aren't currently supported by the m3 plugins. Have you tried adding the attachment and importing into the editor like you normally would, just to see if it works? I'm not sure if adding an attachment would mess up the animations in the .m3a file or not.