White lines between low poly model's faces

Hello, I’m having a problem with either my texture or model. I’ve made a low poly ramp model, but when it’s in PlayCanvas there are these white lines that appear between each face.

Is there any way to fix this? Thanks

Looking at your texture it seems that you have white color around the area that you are mapping on the mesh. Try to add some padding of the same color around the gray area.
Also, because you have the gray area in the corner, you should move it a bit more inside to add the padding, or change the “Address U” and “Address V” value to don’t repeat the texture.