Lighting go throu mesh on Landscape

[Hotshot]

Is this a known bug? I have found it in September and Februari.

If the edge of the Landscape is High then light passes throu it

[Hotshot]

Solution is to fix the edges

[Hotshot]

It also helps if you in the Landscape prop under tab Lightmass enable Use Two Sided Lightning

[reinrag]

I don't know why but i can't notice anything perhaps it's because "art" is not my thing