I made these quite quickly so hope that they're ok. Use surface diffuse and emission settings to change the look and turn slightly towards light if side-lit. I think I might try higher resolution cloud renders from blender next time.
Related on DAZ3D - epic! - Stonemason's Iray Clouds
To Download clicky here
Related on DAZ3D - SILKY! dForce Vivacious Chemise for the Genesis 8 Female(s)
Rough and ready(ish) You might want to re-assign surfaces to make the dress drape how you want it to...so I'll try to do a quick (basic) guide and post it here soon ;-)
Related on Daz3d - Recommended! Elegant Iray Fabric Shaders