USSUALLY THIS IS HOW I DO MY SETTINGS ON WALLS I ADD LAYER OF REFLECTION AND SET 0.7 ON REFLECTION GLOSINESS I ALSO ADJUST MY SUBDIVS TO 21
FOR BUMPS I USE STUCCO AND SET 0.5 ON SIZE
FOR GLASS I USE DEFAULT SETTINGS IN REFLECTIONS THEN CHANGE THE COLOR ON FILTER AND MY DIFFUSE COLOR
GRASS (JPEG) HERE IN MY GRASS I JUST USE THIS TEXTURE AND THATS IT.. I DONT USE BUMPS AND REFLECTIONS ON IT..
ON MY ROOF, I USED THIS TEXTURES AND USED THIS ALPHA AS MY DISPLACEMENT..
I USED HDRI ON GI AND BG COLOR, THEN SUN ON REFLECT COLOR