For more information like this and lots more valuable decorating info try here: Decorator Guide: Tips, Tricks, and Info.

Rug information:  Several folks like to float rugs to make lofts or ceilings so this table shows the various carpenter made rugs.  It also shows the level of the rug, whether or not you can actually stand on the rug, and if the rug is viewable from beneath or whether it is see-through

Name	Image	Level	Can Stand On	Has a Bottom
A Sackcloth Rug		6	N	Y
Large Burlap Rug		15	N	Y
Roughspun Rug		16	N	Y
Small Burlap Rug		16	N	Y
Coalition Ornate Rug		20	N	Y
Canvas Rug		26	Y	N
Antonican Rug		29	Y	N
Broadcloth Rug		36	N	Y
Chic Cloth Rug		38	N	Y
Oval Broadcloth Rug		38	Y	Y
Woven Leaf Rug		39	Y	Y
Halasian Bearskin Rug		40	Y	N
Ornate Linen Rug		45	N	Y
Rough Linen Rug		47	Y	N
Worn Straw Mat		53	N	Y
Round Quilted Rug		55	N	Y
Square Quilted Rug		55	N	Y
Cambric Rug		56	N	Y
Ornate Cambric Rug		56	N	Y
Intricate Windcloth Rug		64	Y	N
Golden Nimbus Rug		65	Y	Y
Horned Leather Rug		67	Y	N
Exquisite Windcloth Rug		68	Y	Y
Swiftcloth Carpet		76	Y	Y
Damask Carpet		76	Y	Y
Di'Zok Ornamental Rug		79	Y	N
Rilissian Ornamental Rug		79	Y	Y
Sathirian Ornamental Rug		79	Y	N

Again a hearty thanks for the work that went into this. What a time saver, even for seasoned decorators.

FYI: if you look at the list you may notice there is a pattern. In general  all rugs that you can stand on are transparent when viewed from below, and all the ones that have bottoms, cannot be stood upon. the exceptions are for some of the high end and/or rare materials rugs.