Last week at Basecamp we ran into a lot of people who were interested in NPR renderings.
took an NPR example of a church from a SketchUcation thread (http://sketchucation.com/forums/viewtopic.php?f=81&t=48550) and ran it through our Soft Shadows and Sketchy
Shadows stuff since it makes a good example of Sketchy Shadows from our
Here is the Church, in SketchUp, with a Sketchy Edges style - the shadows sometimes seem harsh with Sketchy Edges:
We then create a "soft Shadow" image:
This is not as much "rocket science" as we like to
pretend. What we do is change the date and time, save several shadow
images, and then merge them all together. You can get a smoother
soft-shadows image by requesting more intermediate shadow images.
However, for Sketchy Shadows - the next image - it actually works better
with a coarser soft-shadows image.
This next part, Sketchy
Shadows part, was pretty clever, (I think at least). We replaced all the
materials in the entire model with a sketchy hatch pattern, saved that
images as well and then blended it with the soft shadows image to create
a Sketchy shadows effect.
Note how that placing the sketchy
pattern materal on the SketchUp model causes the hatch lines to be at
different angles for different surface planes. You can get a similar
sketchy shadow effect just using a watermark applied over the image. But
I think that having the hatch patterns at different angles makes a
Here a zoom of part of the image so you can see the pattern better:
Here is the model with hatch on all surfaces which was
then merged with the shadow images. (This is pretty ugly, but I included
it for people who want to try something like this themselves.) We
actually made two of these images - with the hatch patterns in different
directions and then merged them, based on the intensity of the soft
shadows image to achieve the cross-hatch vs single line hatch cross-over
in the final image.
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