Corona 6

Set of linen tablecloths for a square table
The scene includes tablecloths for tables measuring 700×700 800×800 900×900 1000×1000 1100×1100

The TurboSmooth modifier has been applied to the tablecloth.
In the export file the modifier has been removed it is recommended to add it with Render iterations=1
Preview using TS on Render iter.= 1

For Corona render it is recommended to install version not lower than 1.5 since the glossiness of materials is configured taking into account PBR.