Texture not rendered on OnePlus One

When I build and run my Unity VR project on my OnePlus One, the various textures used for the leaves, gras, etc appear as billboards, the shape is not visible, the texture appears as tiled images. The texture is in PNG format and the shape is visible on the PC as well as when I run on other devices. It works perfectly fine on other phones, but it's giving this rendering problem on OnePlus One. I have attached a screenshot of how it looks on the OnePlus One... The leaves are visible as images.. shape characteristics are not there, while on other devices it is not so.. Any suggestions? Kindly help.