next »

[jotapeh]

Still, this all misses the point as neither voxels nor trixels end up looking like pixel art however prettily they are drawn.

Agreed, it seems like none of the posts have nailed the concept that the OP described.

I fear this technology may be out of our grasp.

[Alex May]

Trixels DO look like pixel-art, at least when you're looking at them head-on/along an axis without perspective. That's sort of the whole point AFAICT, it's an extension of pixel art to 3D

Well they only look like pixel art because they are pixel art in that perspective, as drawn by the pixel artist. The intent of the OP was to formulate a process that generated bitmap data from e.g. 3D scenes that looked like it had been pixeled by hand.

[nikki]

maybe you could generate a ['voxel' 3d file] with a much smaller resolution then the iginal 3d file.
You could just average the orginal file in.
After that you have a "big 3d pixel filled" object wich you could rotate and draw.
And look at 

[Tycho Brahe]

you COULD use some sort of depth testing method, which ensured that all pixels drawn were the same size, ie; backgrounds would be rendered at a lower resolution than foregrounds.

I dunno, just an idea.

[raigan]

*bump*

[Chromanoid]

the footage was rotoscoped BY HAND in photoshop;

nice video anway...

[Polly]

That effect can be achieved very easily. Simply render to a low-resolution texture, upscale using nearest-neighbor, and down-sample the colors to 16-bit. Attached are screenshots from such a setup made in ZGameEditor.

[Tycho Brahe]

That effect can be achieved very easily. Simply render to a low-resolution texture, upscale using nearest-neighbor, and down-sample the colors to 16-bit.

Yeah, thats sort of what I was thinking, the only thing would be the algorithm used to select the colour when rendering to a low-res texture, Ie, what average do you use (mean, median or mode)

[increpare]

Yeah, thats sort of what I was thinking, the only thing would be the algorithm used to select the colour when rendering to a low-res texture, Ie, what average do you use (mean, median or mode)

Mode wouldn't make sense so far as I can see - there are too many values for looking for duplicates to be useful (I guess you could use buckets and count how many in each ...).  Median relies on having a linear ordering (you could do it component-wise I guess).  Component-wise average would be fine I'd imagine.  You have any reason to think otherwise?

[Tycho Brahe]

Well, imagine "low-resing" an image with a white in one half of the screen and black on the other, with a diagonal line down the centre. You would get a very ugly grey line down the divide if you used the mean, and either black or white if you used the mode or median.

[increpare]

Well, imagine "low-resing" an image with a white in one half of the screen and black on the other, with a diagonal line down the centre. You would get a very ugly grey line down the divide if you used the mean, and either black or white if you used the mode or median.

How would you define the median in this case?


(fair point about mode potentially being useful for stuff with low number of colours).

[Tycho Brahe]

Well, imagine "low-resing" an image with a white in one half of the screen and black on the other, with a diagonal line down the centre. You would get a very ugly grey line down the divide if you used the mean, and either black or white if you used the mode or median.

How would you define the median in this case?


(fair point about mode potentially being useful for stuff with low number of colours).

the median things a good point. Possibly the individual medians if each of the red, green and blue values of the pixel?

[Tycho Brahe]

Sorry for double post but I felt this deserved more than an edit:

I mocked up a simple program to compare the mean, median and mode and I think mean wins out (tested on this image: http://en.wikipedia.org/wiki/File:Apollo_17_Cernan_on_moon.jpg)



How does that look to people, is that a acceptable pixel art effect?

[increpare]

Sorry for double post but I felt this deserved more than an edit:

I mocked up a simple program to compare the mean, median and mode and I think mean wins out

can we see comparison pics?

How does that look to people, is that a acceptable pixel art effect?

No, it just looks like it's been resized - pixel art isn't just low-res (see earlier on in the thread - about dithering in particular) - it encompasses a quite wide variety of compositional and textural effects/techniques.  Also, a main concern in this thread is having something that is in 3d and looks pixelly, while preserving its aesthetic during rotation.

[Tycho Brahe]

okay then, the main difference with this and most resizing/lo-rezing algorithms is that it takes into account the average colour of a rectangle or square instead of just the four corners, which most algorithms (eg its the default in opengl and in processing) do.

and I'll put some comparison pictures up when I have time

[gimymblert]

We need something that process high frequency and low frequency separately

[Lon]

How does that look to people, is that a acceptable pixel art effect?

Interesting, but I am afraid increpare is correct, it looks like a resized low-res image (try  resizing it small to kinda see the inverse effect).
I think an important part of pixel art (though I do not have much experience making pixel art) is using a limited pallet and having more contrast between different objects.

[Alex May]

Using image filters is probably a bit of a red herring. I think something like this would need some AI.

But I still think it's impossible.

[Mikademus]

How does that look to people, is that a acceptable pixel art effect?

2D art is an artistic style, not mere pixelation.

[nikki]

to me it looks like a simple resized image too (wich it is)
the original image is a simple 2d bitmap too, so it would be extra complex to magically analyze that image, whereas a 3d image would give out more metadata..

then again, when a simple pallet is applied over this image, i'm sure you can fool some people in believing that its pixelart...