Why are all of my normal textures red after restarting?

Yesterday the software worked well. Today, when the editor is launched, 5000 shaders have been compiled and now EVERY normal texture became RED (the red channel is pure white). Import the textures does not regulate the problem, as well as the removal of DerivedDataCache.

The problem comes from the compression TC NormalMap. The texture is correct with compression TC Default. Of course, change the compression create problem in rendering…

The problem came from the project settings: “Use DTX5 Normal Map” was checked.

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