Inverting a normal map in Blender

Y+ and Y- normal maps Some applications like the Unreal Engine 4 use Y- normal maps, which means the green color channel of these normal maps looks as if it was lit from below. Blender on the other hand uses Y+ normal maps, where the green channel looks like it was lit from above. If […]

How to invert a normal map’s green channel in Krita

This tutorial explains how to turn DirectX normal maps into OpenGL normal maps in Krita by inverting the green channel. If you’re used to inverting a normal map channel in Photoshop by selecting the channel and pressing Ctrl+i, you might have noticed that this doesn’t work in Krita. Instead Krita inverts all colors in all […]

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