Things created in Blender doesn't show up in S4S {Solved}

Could you upload the blend and package? I'm not an expert in S4S but maybe I could try to diagnose the problem.

First thing that comes to mind is, you'd you assign correct cut numbers to the object groups. The table cloth and the decoration needs be added with a group that has a correct cut number assigned. If you don't know what the cut number is, please read this.

It gives an explanation of the cut number and how it's done. 

OK, First things first. HOLY TRIANGLES BATMAN! I converted your curves to geometry, deleted all the extra curves and then combined that mesh and your table cloth with the altar. Then tried to export it in S4S. But at 600,000+ Triangles I have little confidence S4S can import it, and if it could its just not a viable thing to run in game. Thats like all the geometry in the game in just 1 object.

My suggestion is this. Now that you know what the table cloth looks like draped properly (I'm assuming you used a cloth modifer), make a low poly version draped over the table. Also that logo thing because of how detailed it is probably has 80%-90% of the poly's in just that. I would suggest you achieve it by bump mapping and/or texturing. Otherwise you're just going to seize up your game with trying to run this model.

I have been sitting here thinking about how best to walk you through it. Its not as simple as do this, then this, then this. It comes down to having the knowledge of being able to model. It wouldn't be easy to do without making a full blown tutorial.

Before I even talk about modeling though, do you have any knowledge at all of photo editing programs?

I'll see what I can do to help, its just a lot to cover if you're not super familiar with blender. (I might have to make a video) In the meantime, I suggest trying to become more familiar with blender. Modifiers (mirror modifier most especially). Knife tool, loop cuts, extrude. I suggest trying to make something simple, like a crate. Blender is a great program and is super rewarding to learn. But I suggest trying to model simple objects before learning something complex. Relatively speaking your model you want to make is a simple object, but you have to think in terms of simplifying shapes (especially when putting something in a game).

If you were making a single rendered image your polycount is less important because you are rendering it only once.