high kicks and backflips

Random crap from the past six months

2011-01-17T05:03:00.004+02:00

Sculpting is nifty. The topology is crap though. Because I suck at 3D modeling.

3D is hard OK ?!?!

After Blender character anim tutorial.

Bald eagle T-shirt

2010-06-07T01:17:00.003+03:00

Painted a 300dpi version of the super-deformed bald eagle and created a T-shirt with it. Get it from Zazzle or Spreadshirt.

Animal charas

2010-06-01T14:06:00.002+03:00

Maybe make a hieroglyphic writing system out of these. Then engrave a rock and cause lots of consternation to future archaeologists.

Corsair studies

2010-06-01T14:00:00.003+03:00

From last week, drew some pencil studies of F4U Corsair photos. The flaps and bent wings make it look very organic.

And an earlier sketch from memory

F4U Corsair with progress

2010-06-01T02:26:00.006+03:00

More MyPaint painting. A F4U Corsair! In Brit livery! With late-model 4-bladed prop! Were there any such beasts? I don't know.

Used a couple Wikipedia photos for ref: back view, under view, front and color scheme, side view.

8 minutes

Started off with a very simple perspective framework (you might be able to see cross-shaped lines in the underdrawing), then drew the plane on top of them. I've drawn a couple different pictures of the F4U Corsair last week, so I'm working partially from memory here. That's probably why I got it done so fast. My drawing tablet has occasional weird tracking problems, the circles are for working around them...

19 minutes

Continued drawing and refining. Customized the eraser tool to use opacity 0.5 instead of 0.05, making it less frustrating.

31 minutes

Trying to figure out what I'm going to do with the light.

42 minutes

Came up with a hack: put sun reflecting from the sea at the top. Notice that I never managed to draw it properly, so it looks more like a weird cloud. The clouds are kinda lacking. Perhaps should ref them. Lacking contrast in plane. The yellow nose looks bad.

70 minutes

The yellow nose still looks bad but in a different fashion. Plane-bg contrast better, tailplane is too light. Markings are very "njaaa there's something there, enough!" The hard highlights work good, tight shapes are tight. Wing leading edge curve highlight kinda bad. Fuselage above that very messy.

Trees and a river

2010-05-12T02:41:00.002+03:00

Kinda screwed up the leftmost branch there (breaks the layout curve) and the right shore horizon line is ??? and the left shore reflection also. The river doesn't read.

More stupidheads

2010-05-08T02:15:00.001+03:00

This time in varying styles.

Reflector vests

2010-04-30T00:09:00.005+03:00

Illustration for a slide deck, took around 1.5 hours. Need to draw more cars.

Sketch:

Cropped:

Kattefnatt

2010-04-17T20:09:00.003+03:00

Some nondescript big cats from memory

Limb variants

2010-04-17T20:09:00.001+03:00

Matrix of heavy-light arm-leg permutations

Jaguar

2010-04-17T20:08:00.006+03:00

Sketch

ref

Step 2: Doing red without red is .. challenging. There is some trick to it, hmm... use saturated cyan for background, dark neutral grey for object color?

Step 3: DONE! If anyone offers you a job painting spots on a jaguar, do not accept.

What the hell

2010-04-17T20:08:00.005+03:00

Mastera

2010-04-17T20:08:00.003+03:00

ref

Sketch:

Update:

After setting down the palette, I hid the reference photo and painted on top of the sketch, trying to work from memory. Comparing to the ref, the bow shape is wrong and the bow sucks in general. Bow wake is screwed up. The red is too thick and too filled. Lighting doesn't work (not that there is much). Good exercise.

Update #2:

Continuing from yesterday. Brought back the reference photo and started fixing things. This thing has a super busy deck with an endless amount of red pipes and railings and all other tanker craziness. I still need to put in the name and the windows and blend out some of the spurious detail. Now, a good question would be whether this kind of an illustration would be better achieved by just tracing the photo instead of doing it the hard way like this...

Update #3:

I think I'm going to leave it at that. The deck is lacking detail and the water is very suggested, so those would be the things to sink more work in. And the bow form doesn't read quite right. Oh well, maybe I'll fix them later, if it starts bothering me enough.

Update #4:

Done!

Some random sketching

2010-04-17T20:08:00.001+03:00

random imaginary head

from watching this (been listening to the Ancient Greek History course while painting). Bad likeness, should do better.

ref

Another cormorant

2010-04-17T20:07:00.003+03:00

ref

Second cormorant today. Man, this took hours. The green background is evil too. I like the soft feathers, it is a nice effect.

[edit] Version with palette visible and minor touchups, 4:3 aspect ratio

MyPaint tutorial: Painting a Cormorant

2010-04-17T20:07:00.001+03:00

Recently I've been using MyPaint to draw and paint. MyPaint is an open source painting program with a really nice brush engine and lots of good preset brushes (even if I mostly end up using just five...) Anyhow, this is my attempt at describing how I paint a picture with it.

I'm using this Cormorant photo from Wikipedia as a reference. I had the photo open on the other monitor while painting. As I'm working from a photo, this tutorial is less about constructing and lighting a cormorant and more about expressing the shapes and colors of something you see.

I'm not a total master expert of painting, so if I'm saying something wrongheaded and stupid, it's your responsibility to set me right! Now, let's get started.

At 0 minutes, start the timer!

The first step is picking a background canvas: I went to Layers -> Background... and picked a nice blue one (so that I don't have to work so much filling in the background color). Then I picked the 6B pencil from the brush window and drew a rectangle to act as my work area. It gives you some structure to work with.

I tend to have the brush selection window and the color sampler open when I'm working (B and T are the hotkeys to toggle those, respectively). MyPaint is very much hotkey-driven. Keep your other hand on the keyboard and draw with the other. The main hotkeys are 'd' and 'f' to control brush size, 'r' picks the color under the cursor, 'i' mirrors the canvas, and '.' and ',' zoom.

At 6 minutes

Next, I drew a rough sketch of the cormorant, focusing on proportions, basic structure and value separators. Drawing a polygonal sketch using straight lines helps with getting the angles and proportions right.

At 9 minutes

I mirrored the sketch to see it in a new light (helps spot problems). The beak was a bit too thick, so I toned it down. Then I picked the flat wet brush from the brush window and set down five colors for the palette.

The palette I use depends on the image, but it usually has a dark value, a light value, a medium value, some basic colors plus grey. Here the dark color is nearly black red, the white is yellowish, the blue is for shadows (water & sky reflection), the orange is for feathers, the grey is for shadows and doing saturation contrasts.

Putting down a palette before painting helps me a lot. Without a palette, I have a tendency to get stuck in smudgy midtones with no color variation. And a small palette somehow helps with getting impact in some strange manner. Maybe it makes the results more graphic? Dunno.

At 10 minutes

I started painting by putting down the shadow parts. When I ended up covering the drawing, I redrew the lines with the brush.

At 12 minutes

Next I picked the blue and did the white shadows with it and jotted down some background.

At 14 minutes

I used white to do the lit areas. At this point, the image is pretty much done and the rest is just refinement :)

At 18 minutes

Brought down the darks and refined the edges. The light-dark edges are pretty much _the_ defining feature in an image. If you get them right, you can just about screw up the rest of the picture and it still comes out alright.

The wet brushes smudge and blur when using light pressure (on a Wacom tablet). When pressing more, the brush puts down more color. So they work nicely for blending and painting, you can go from really soft surfaces to hard edges with the same brush.

The dry brushes put down color directly without smudging, so they're good for getting an equal color on a surface. I used the flat dry brush to even out the black part in the above image.

At 22 minutes

Added orange for the feathers and the reflection of the white feathers, and the light coming through the tip of the beak. I also worked some texture in the back feathers.

At 29 minutes

Tightened it up, blended the head feathers, worked silhouette details. The blue outline looks kinda nice. I'm using gray on the eye and the beak. The Hard Details brush works well for sharp detail work.

At 37 minutes

Blurred the back feathers with a grey flat wet brush using light pressure. Twiddled with head outline, toned down the eye, smoothed the beak shape, worked the throat light-dark edge, random pinch and tuck.

And a couple more minutes

I did the changes below after writing this post, so I don't have an accurate number. And it helps to go away from the picture for a while. Helps spot problems.

Tweaked head shape, added texture to feathers, popped out the underside of the beak with a lighter edge. Also tweaked the eye shape a little. Done!

Lion waiting

2010-04-17T20:06:00.004+03:00

ref

Lion and Fox

2010-04-17T20:06:00.003+03:00

ref, edit: version with reworked hind legs

ref

Fox and crow and jackdaw and gull

2010-04-17T20:06:00.001+03:00

Photoreffed, this went too fiddly towards the end.

Photoreffed, around 30 min.

Photoreffed, around 15 min each.

Another wolf

2010-04-17T20:05:00.006+03:00

Photoreffed

Wolf

2010-04-17T20:05:00.005+03:00

Photoreffed.

Bears

2010-04-17T20:05:00.003+03:00

Photoreffed from Wikipedia and GIS

Tyger Tyger, burning bright

2010-04-17T20:05:00.001+03:00

And a goth version for goths

T.Rex

2010-04-17T20:04:00.003+03:00

Looks silly

More skull drawing

2010-04-17T20:04:00.001+03:00

Knowing that you can use a skull as a scaffold to help draw human heads, what would happen if you used skulls from other species and tried to drape them with human features. Weirdness, that's what.

Sketching: paper

2010-04-17T20:03:00.004+03:00

Random exercise in visual storytelling

Pink mountain

2010-04-17T20:03:00.003+03:00

Hrm. Perhaps I need to do the 500 painting project to get better. Dead hue range.

[edit] Added curved version. Perhaps I start using the curve tool as an integral part of the process in order to get a funny color scheme...

Chromebot

2010-04-17T20:03:00.001+03:00

Thought of doing some proper image with the absorption method but got lazy and just chromed it. Pffft. Layout and blue-orange sky after some YouTube robot speedpainting video I saw a month ago but can't find any longer. On the right, an amusing hot pink curved version.

Light color study

2010-04-17T20:02:00.002+03:00

When you see a light, it's emitted light. When you see anything else, it's reflected light. And with that, let's follow the path of light to your eyes. Well, what's my understanding of it, at least.

To determine the mix of light wavelengths reflected off an object to your eye, you need to consider the other objects that your object reflects and what the other objects reflect, and so on, until you reach a light source. Then you need to consider the angle between the object surface and the reflections and the texture of the object surface and the transparency and refraction of the object. Last, you need to consider what wavelengths the different objects absorb. Keywords: optics, anisotropy, diffuse reflection, specular reflection (speculum: mirror, specular: mirror-like), Snell's law, quantum electrodynamics, absorption of radiation, atmospheric attenuation.

Next, you go from a light outwards, on each reflection subtracting the absorbed wavelengths from the light color, until you reach your eye. For a scene with multiple lights, you repeat the procedure for each light and add up all the light that reaches the eye. The cone cells in the eye have a cone of light-sensitive pigments to detect light. To figure out the color as perceived by the cone cells, you need to take the pigment colors into account. There are usually three different kinds of pigments in the human eye: lots of green-sensitive, some red-sensitive, and few blue-sensitive. The sensitivity ranges for the greens and reds overlap quite a bit, as well. As a result, green appears bright, while blue appears dark. Keywords: ray tracing, photon tracing, retina, cone cells, color vision, perceived brightness.

At this point, you have a bunch of photoreceptors excited by the incoming light. But it's not the end of the story by any means. The photoreceptors are a part of a laterally inhibited neural network: an excited photoreceptor depresses the other photoreceptors around it. This acts as a natural sharpening filter, making the edges of lit areas appear brighter and the edges of shadow areas darker. There's also a system in place to fade out static images (probably to iron out imperfections in the eye?) The actual perceived color also depends on the overall color of the scene and the part of it inside the three degree field of sharp vision. And then you truck the information off for further processing (yeah, this is where my knowledge ends). Keywords: limulus eye, lateral inhibition, relative color, checkershadow illusion, Mach bands, stabilized retinal image, Troxler's fading.

In practice, it's relatively simple to apply the light reflection bit to painting: For lit objects, start off with the light color, subtract the absorption part of the object color (keeping diffuse and specular reflection in mind). For unlit objects, use the environmental reflection as the light. Add complexity as much as your head can handle. I tried it a bit earlier today, and it seems to be working alright.

Tomtegebra concept art

2010-04-17T20:02:00.001+03:00

Concept art from last summer for Tomtegebra, see also this for more background. I ended up scaling it back a little. And by a little I mean by everything.

Oh Lollington, you so fabulous

2010-04-17T20:01:00.002+03:00

And some glaciers from the previous sketchbook

And related to the previous post

Silly head drawing tricks

2010-04-17T20:01:00.001+03:00

...or maybe I'll turn this into a drawblog. On second thought, better make a new blog for that.

[edit]
Have a two color practice pics too (drama in value range courtesy of the curve tool, oh what would I do without it. Less massacred-looking images perhaps.)

Intent

2010-04-17T19:57:00.001+03:00

Welcome, welcome. This is the art-centric offshoot of my other blog. Daily drawing routine, that kind of stuff. I'll be moving the drawing posts here and leave the math-CS-stuff over there.