viewtopic.php?f=81&t=4616&st=0&sk=t&sd=a&hilit=watercolor
that made me to learn a lot from the comments, so thank you all
after a while I am back on this sort of NPR renders with this one:
http://www.sketchupartists.org/?page_id=3318
this topic also could be shared on the tutorial section,(up to moderators) and there are some tips that I've ignored on the Sketchup artists, and here they are:
1-when you are gonna using Ies lights , you must hide them before exporting the raw SU image
2- prevent such flat and mechanically renders... unlash you inner artist , play with levels, do some dodge and burn....over the final result
3- at the last step and then and only then use texturizer filter
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also here is link to a similar trick by Tom:
viewtopic.php?f=81&t=22020
and here is an exterior test:
that is based on these two images:

