My new materials are not working.

I want to put an png image in the Terrain Painter. I click New Layer and click on Edit on diffuse. I selected the image I want to use and click ok. My image just appears white in the thumbnail. When I paint it on the terrain, it just takes away the small detail texture and leaves the macro texture of the current ground. Why is this? I have no idea what I did wrong. It's the same with jpegs and any other format!

Also the detail section of the Material properties, when I set the image it is just white again and when I paint it on the ground, it is black!

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Nevermind everybody! I found out myself. You need to have the image file in the "BeamNG-DRIVE-0.3\levels\LEVELNAME\art\terrains" folder in order to work. after you have put the image in there, select the image in Material Properties in the terrains folder and you're good to go!