NPR architectural lines?

[brunojac]

Hi,

 

I'm trying to do a NPR image of a new work, but what I still don't know is how to do that architectural like lines.

 

Does anybody can gives me a help?

[Ricardo Eloy]

Hi, Bruno!

Your image looks nice, but I assume you're looking for that sketchy style, huh? Well, buddy, thousands of ways to do that. You can try some Photoshop filters (try Sketch, for instance) with different settings. You'll get some interesting results.

And, of course, you could also try our beloved SketchUp!, which does exactly what you're after. Stay tuned for the soon to come new SketchUp! tread in the CGA forum (or did I hear it wrong, guys?)

[]

Rick

[nisus]

copy your layer, find edges, glass or ocean filter

[brunojac]

How do I find edges?

[nisus]

Go to Filter/Stylize/Find Egdes

 

rgds

 

nisus

[Ernest Burden III]

How do I find edges?

Go to Filter/Stylize/Find Egdes

For more control, use 'glowing edges' instead, set edge width to 1 and smoothness to 1 and play with the brightness slider. Next hit Cntrl. I to invert the result back to a white background. You will have colored lines. You can either just do image>adjust>desaturate to get gray/black lines, or use hue/saturation to select the colors one at a time to both desaturate and adjust their light/dark value. You may find it interesting to make some colored lines white to reduce the heaviness of the layer.

[ingo]

And if you want more control you can render your image with a cellshader/toonshader and make all objects white. Depending on what cellshader you use you have a lot of controll about your edges, you can even add a displacement map or give a line thickness based on depth. Than comp that kind of hiddenline image over your nice sketchy image in your image editor, and experiment with different layer settings. And of course you can erase lines you dont want to have.

 

HTH

 

ingo

[archkre]

Bruno & myself are trying to achieve in PS that effect of "lines not exactly coincidin' in the vertix handrawing effect"

At least that is what I don't know how to get!

Squiggled-lines effect is easy but how:The effect of "lines not exactly coincidin' in the vertix handrawing effect"

[brunojac]

Right to the point Daniel!

 

After your help I could find the edges, and the thing of finding it using a white render is really good Nisus, but the point is to do lines like it has been drawn by an architect hand, it's not just add noise, the lines does not coincide the end of each other the pass just a little ... that's the difficulty.

 

This image is a real sketch, see the diference of the crossing lines.

[archkre]

Sorry but I am very anxious and just gotta apply that on a job!

My Xanax is not workin'!

[Ernest Burden III]

Sorry but I am very anxious and just gotta apply that on a job!My Xanax is not workin'!

Judging from your avatar, you may indeed need to raise your medication level.

 

What is the source material you have to generate lines from? As you have seen, many people have been using the native function of SketchUp to do the extended lines. I used to use my CAD program to do line overshoots. Now I'm using Photoshop over flat-shaded renders--as described in another thread. The process involves motion blurs and produces lines that are less literal than 'line display' modes, so is a matter of taste.

 

Unfortunately, the process takes a lot longer to explain than to do.

 

What are you working from and what are you trying to do?

[sergio rocha]

hi guys, if you are ever interested in gettin quick line drawing (ink type NOT sketch), i would advice to desaturate the image, add contrast but don´t use "find edges" but "glowing edges". This will let you control your expression reall quick with cleaner results. About the jitters ...hmm i really don´t likem much in npr because they´re a natural result of quick skecthes made by hand, but i still prefer them in sketch up .Here´s an example of a "glowing edges" in 5 min.

 

[archkre]

I used to use my CAD program to do line overshoots. [/QB]

How do you dou that in Acad?

With the program "Squiggle" or what?

[Jim Kessler]

Another attempt with the 'New' technique:

[Ernest Burden III]

I used to use my CAD program to do line overshoots.

How do you dou that in Acad?

With the program "Squiggle" or what? [/QB]

 

No, squiggle just squiggles. And I have no idea if it can be done in ACAD. I use Datacad. It has a setting 'overshoot' that makes lines go a set amount past an endpoint.

 

 

As seen in hybrid media tutorial:

 

 

detail from later in the process:

 

 

The linework was printed from the CAD program to Acrobat and that was rasterized into Photoshop.

 

But I'm past all that now.

[brunojac]

Great job! Realy very good!

 

That's what we are looking for, but in max/viz or maybe autocad...

 

I was thinking about, if autocad could put a block that is an * of 2 or 3 lines in every vertex it could work, maybe also max using latice ... by now are just taughts ...

[John Dollus]

FinalToon from Cebas can produce what you are looking for. I have been searching for a similar method for quite some time. For stills, any of the above methods work just fine. For animations, however, they all fall apart or are too time consuming.

Unfortunately, I have not tested FinalToon firsthand so I cannot vouch for it's ability but look at www.steve-weber.com

Look under 3d artwork->2002->Destiny

[Ernest Burden III]

FinalToon from Cebas can produce what you are looking for.

Probably, so can Illustrate, available through Digimation (or the original author's site).

[John Dollus]

Illustrate does not extend lines beyond their physical location. What you see is what you get. FinalToon allows you to 'project' vectors to achieve this effect.

(or so they say)

[Ernest Burden III]

OK, thanks for the correction. That's good to know.

[jucaro]

i'm trying to brush-up my npr style too. Just another NPR attempt until I can afford a FinalToon plugin.

This was from a real photograph of the building (i forgot the name) manualy traced in autocad just to get the major line projections and then composited in photoshop with standard filters.

-diffuse glow

-layer blending

 

[ April 17, 2003, 05:27 PM: Message edited by: jucaro ]

[Richard McCarthy]

Hi Sergio,

 

I have tried to replicate that result you shown, but I can't seem to get it ?... what exactly did you do? Glowing edge and the invert the colour, it still doesn't give that inky bloat look though... ? could you elaborate?

 

 

-RM

 

 

Originally posted by sergio rocha:

hi guys, if you are ever interested in gettin quick line drawing (ink type NOT sketch), i would advice to desaturate the image, add contrast but don´t use "find edges" but "glowing edges". This will let you control your expression reall quick with cleaner results. About the jitters ...hmm i really don´t likem much in npr because they´re a natural result of quick skecthes made by hand, but i still prefer them in sketch up .Here´s an example of a "glowing edges" in 5 min.

 

[sergio rocha]

hi richard i´ll try to explain you reall quickly.

you can allways find very nice posts about npr tecniques. I use this one a lot because it´s the fastest way to get usefull results. I normally use them on wip´s as my finals will allways be photoreal... :ebiggrin:

i´ll use a wip.

 

original image :

 

 

 

step 1 - desaturate one layer copy and glow it.

 

[sergio rocha]

step 2 - invert it, select the darker zones and give them brigthness.

 

 

 

step 3 - add some noise.

 

[sergio rocha]

step 4 - pick another original, give it brightness and noise.

 

 

step 5 - you mix the layers by selecting "linear burn" on the layer props and play with brightens and contrast..

 

result (quick and simple) :

 

 

if you prefer a jitered style you can play with photoshop filters to get diferent results like this :

 

 

hope you could understand. i really had to be quick . :ebiggrin: