Material/Textures appear in viewport but not rendered
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So I am putting a wood material onto my floor and it will show up in the viewports and allow me to modify it through UVW Map, but when I go to render it, it only shows up grey. I was working in the beginning doing quick renders i could clearly see the material but I have been working for 8 hours and within that time could have accidentally selected an option to messed with this.
It is not the material because it will apply to other objects, i believe there is an issue with my floor. I have an extruded object underneath my floor that I messed up in SketchUp but figured it wouldnt be an issue in 3DS so i didnt waste time fixing it, but i can see this object when i render, meaning somehow it is rendering my floor as transparent. (i know the extrusion isnt the issue because i have used this model before and didnt have an issue with material rendering to it)
I am so confused and have searched for hours on the internet with no luck.
Using Windows 10, 3DS Max 2017 and mental ray settings with Arch &design materials/bitmapping.
Please help!