That looks exactly the same as the inside of every tent pic i've seen. I could not tell it was otherwise until i looked closer at the bottom of the pic.lol
So you did a homemade thing? Good for you.
I've heard, years ago, of people haveing problems with off-gassing. Forget which tent mfg it was. Anyhoo, if it were me I'd do 3 things.
1. Contact a good tent mfg and gently 'grill' them about the chemistry of their materials
2. figure out if what you have there off-gases/is made from same as 1.
3. compare and decide.
hate to see ya have a problem. Hate to see ya have to re-do it all. first 'hate' is worse in my books.
4 Get on 'er.
5 Rock n roll
Okay that's 5!