Im new here, today actually, and kinda new to Sketchup. It is interesting that this topic is being discussed because I wasn't so happy with some renderings my Architect was doing…
I ended up kinda learning Sketchup over the last month or two to show her the angles I wanted for the renderings. She then did a rough rendering and I wasn't too happy with it so I learned some more Sketchup stuff and in the last day or so I started messing with my Sketchup output in Photoshop... I think Im kinda getting there.
Maybe you guys can add to what I have done, although I don't think that this is as good as some of the stuff I have seen here, (especially Ross’s stuff-wow) but it is all done with SU7 free and PSCS3
Here is what I’m doing:
I output three or four versions, changing styles each time.
I have been using the Sketchup "Sketchup Style builder competition winners" Styles included with the free version of SU7
"Pencil Edges With Whiteout Border. Created by Mark Paschke." Is the one I am using for this.
I output Tiffs:
One with no background, no sky, edges only (for top layer in PS)
One with Sky, Shaded, no edges (for middle layer in PS)
One with Sky, Shaded, with edges (for Bottom layer in PS)
I stack them in layers in Photoshop in the order mentioned above.
On the top I clear out the white so I have only black pencil, I sharpen it up a little
The middle one (the one with no edges) I apply the filter Artistic>Poster edges to generate a few large contrast-ey areas...
Then Noise>Median to smooth and blotch them out
Then if it needs more interest a little “paint daubs”–maybe I didn't use it on this one though.
Then I use diffuse glow on the bottom layer, with no graininess–this makes it pop–I so dig that filter–then I fade it back to a reasonable level after applying.
I mix the layers together, the bottom layer full strength, then somewhere near 30 percent for the middle layer, combining using “vivid light” helps the colors get that over-saturated watercolor color vibe.
I then just adjust the toplayers opacity to make the lines feel sharper.
Then I flatten the image and paint a bit by hand with Bit box’s watercolor brushes (no affiliation–and they are free)http://www.bittbox.com/freebies/tribute ... downloads/
Anything that is very saturated I paint with the main color at maybe 15% transparency, using the “normal” setting. And I make sure to go outside the objects to get the color running on to other objects.
After I have done that I then run around with the brushes using multiply at 5-10%.
You have to choose different brushes at different sizes and edit them a lot to make it look random.
Anyway, I just thought I would put in my cent an a half
Attached is the watercolor experiment–I darkened up the jpeg because when I was converting the sky was getting washed out, PC gamma people let me know if it is too dark for you.