TESR Texture goes black if a block is in a certain position around it

[BeardlessBrady]

Image: http://imgur.com/UsMCcWI

 

In the picture above the right one is how its suppose to look, but if you place a block on the right top side of a block it changes the window texture to be black.

I've tried a few lighting things, not really sure how to fix this.

 

TESR: https://github.com/BeardlessBrady/Currency-Mod/blob/master/src/main/java/gunn/modcurrency/client/render/RenderTileVendor.java

 

EDIT: Only if a block is placed one block up on the north side

[BeardlessBrady]

To render the transparent window. I was having problems with multi-layer models. What is the simpler way?

[Jugbot]

Just change the render layer to cutout for models like windows. Then you can fix any shading issues like this with "shade": off

[BeardlessBrady]

how would I do that in a TESR with a baked model?