Call of Duty 4: Godrays
From COD Modding & Mapping Wiki
- Create a brush caulk that fits in the window hole
- Modify the shape by pressing ¨E¨ while selecting the brush
- Select the external faces with control+Shift left click and go to patch menu and give it Faces to Terrain
- Delete the brush leaving the faces and applying them the godray texture ch_godray.
- With the Faces to Terrain the textures shows up at both sides
Hope it helps!