It seems that grass textures and detail meshes added to the terrain are automatically filtered (bilinear or trilinear) regardless of whether the original textures were imported using point filtering. Is there anyway to change this behavior? An example is shown here: http://pbrd.co/1DZpFMG where the left shows the grass texture placed on the terrain, and the right shows the original point-filtered texture.
Virus Total I haven’t checked the file, so it might not work as intended. But it is supposed to take a low resolution texture and then convert it to a high resolution (512x512, this should be enough) texture which would look like you have point turned on.