Quote: "Just a quick heads up, I am finding a lot of models with the wrong normals, if you are using DNS textures the normal needs to be +Y and for PBR -Y GameGuru may show the model as all black if it cannot use the normal map, sometimes dependant on the model (PBR) it needs to be +Y if you find an issue with your normals when testing your PBR Asset flip the Normal Maps Y in you texturing program and try it again.
The Y Channel is the Green Channel"
If anyone wants to know how to do this in GIMP, then here's how it's done:
1. Load your normal image into GIMP
2. On the right hand side you will (if using the default layout) see a window with your layers, right at the top of that are tabs, click the channels tab.
3. Toggle all the channels by left clicking them until only the green channel is highlighted in blue.
4. Go to the menus and select Select > All.
5. Go to the menus and select Colors > Invert.
6. Go to the menus and select File > Overwrite {name of image}.
Job done.
Took me ages to work out how to do that, and searching on google didn't help very much.
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