Here's my caustic version using mm. in sketchup since inches is the default unit. I use nomeradona's displacement texture here - many thanks sir nomer
From Default setting open vray option editor, adjust GI photon radius from 50 to 250 and caustic subs 1000 to 6000 open caustics change Max photons from 30 to 762, Multiplier from 1 to 1.5, and search dist from 20 down to 1.5 and I set my texture size in material editor 7000w x 5250h in mm. for more realistic caustic projection.
here's my sample image render using two different caustic subs
sample image render using 4 different search distance
sample image render with good caustic setting (please correct me if i am wrong)
here's the trick using that same displacement - add reflection and set IOR 1.33
in diffuse layer M attached the displacement material by nomeradona
in transparency layer M attached texAcolor and change pure white
add refraction set IOR also 1.33 and set Fog color RGB 205,247,255 and change mult from 1 to 0.1 ( this is the tint color multiplier higher value produce darker color tint lower value produce lighter color tint ) :)
add displacement using same texture displacement with 0.5 value
Some of us can still recognize these excellent images done in Vray SketchUp. Who could believe that most of these works were done with the old VraySU 1.05.33.Well, the man behind them is Zernan Suarez, aka "Zdesign". Zernan is one of the famous visualizer at http://www.cgpinoy.org/ using Google SketchUp and VraySU. I myself is a fan and follower of this man. I love the way he creates his scene with dramatic lighting. Zernan's is also a generous and regular contributor of excellent tutorials when it comes to visualization.
. . .
If you remember, this vray for sketchup rendered image is one of my entry in September 2010 Chaos Group Vray Render Contest and it's included in one of the pages of CatchUp – SketchUcation Community News – Edition 1