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Old 11-17-2005, 11:50 AM
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slaterza slaterza is offline
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Bark/Wood demonstration

I was asked if I could give a tutorial on rendering bark and wood in airbrush. I want to apologize to all the purist out there first. This tutorial is going to include things other then just airbrush although I think if you wanted you could apply these techniques with just the airbrush I just find it faster and more fun to employ other techniques with the airbrush.

I think it would be good to start with some samples of bark and wood that I have done so you can see what I have done with these techniques. In this part I will include both airbrush and non airbrush pieces.

Ok on to the demo




These show a variety of barks and textures. The thing about tree bark and wood is that it comes in so many varieties and textures and there is no real way to show you just one method of drawing it and painting it, so this will just be a lesson in basic principle that you will need to adapt to whichever tree style you are using.

One general observation before we get started is that tree bark is almost never brown. This is something that we pick up in elementary school somewhere along the way and we all color our trees with brown bark. Next time you are outside look at the tree trunks around you. there are of course exceptions but for the most part trees are a some shade of grey not brown as we so often want to paint them. They generally vary from a blue grey to a dark almost black charcoal grey. All this to say look at the color first do not just reach for the brown before you start.
Now there are some varieties of trees that are light tan you could call them brown but even they are more of a grey tan then a brown tan. Just a general observation to start.
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Last edited by slaterza : 11-17-2005 at 12:46 PM.
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Old 11-17-2005, 12:08 PM
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Re: Bark/Wood demonstration

The general observation that I just made applies to the bark and not the color of wood inside this is often a shade of brown.

Side tracked again.

Lets start with the wood texture.
1. I start by laying in a streaky base. The base is made of ultramarine blue and yellow ochre as well as burnt seina and titanium white.

2. I then sponge over that with a deeper mixture of the base color

3. Over that I airbrush some ultramarine blue and burnt umber to give variety of color

4. On top of this I took some watered down black and with a splayed brush made streaks in the direction of the wood grain. I also added some darker cracks

5. Sorry for the big jump here I do not have the middle stages of this but all I did them was come back into it and work on enhancing those lines with a hairybrush. I took the original mixture and added some titanium white and a little yellow to it and use that for the highlight side. For the darks I just added more ultramarine and burnt umber to the mixture. I also did some straight sepia for the darkest parts.

6. I then use the airbrush to come back in and soften some of the shadows and such. Here is a close up of it.

The keys were done in the smae way as this just a little more work on the texture as the wood is closer to the viewer.
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Old 11-17-2005, 12:22 PM
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Re: Bark/Wood demonstration

Now for an example of bark. This is just an example of one type of tree bark. As I said earlier there are many to choose from and some are smooth and some are more bumby. I choose to do a less smooth one so that you can get the most out of the deomonstration.

1. First for the sake of this demo I started by masking the tree and laying in a simple background because I hate to look at the white of the paper. I also drew some suggestions for the way that the bark will go this is just for my purpose it will be covered in step two. I believe in thinking it through first even though I know that it will be covered. Like laying out your map before you get started on a trip.

2. Second I laid in a flat color. This is the midtone color. I mixed my color from ultramarine blue, burnt seinna, titanium white, a touch of yellow and a touch of red

3. Next I again lay a map out of general lighting and form. This will be greatly covered by texture in this piece but it helps me to visualize where I am going and takes only seconds to do. I just used a darker mixture of the same colors mentioned before.

4. Now I sponge on some texture. This could be done with the airbrush on a low pressure or with a spatter cap. You could alos blow across a clothespin to get this effect. If you have questions about that i would be happy to explain that later. I just like the look of the sea sponge and used that to texure the tree. I use the same dark mixture that I just airbrushed the shadow with as well as a lighter mixture and a mixture of light tan just to add variety.

5. Next I take a no. 4 round brush and use the same paint mixture and start making lines for the bark texture. These look really rough but we will refine them later. It is best to twirl your brush in your fingers as you do this to make thick and thin lines.
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Last edited by slaterza : 11-17-2005 at 12:49 PM.
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Old 11-17-2005, 12:33 PM
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Re: Bark/Wood demonstration

6. I then made a drker mixture and started to enhance some of the lines I did before trying not to copu over them exactly but ride along side them to start building depth.

7. next I take back up the original color and water it down a little and scumble it over different areas to start and build up layers of lighter bark texture. I do this maybe two or three times. Then I came in with the airbrush and strengthened shadows as well as lighten some areas. It is starting to take shape but at this point it is still slightly out of focus.
8. I came back in with more airbrush work and this time with a transparent and tried to make some areas reced a little here and there. Adding shadows and depth to certain areas of the tree for variety sake.

9. Now I come in with a really dark version of my base color and start to really add definition. I only did half the tree and then scanned it so you can see how this really starts to help the tree take shape. I do this with a liner brush and also with the airbrush both using the smae color so that I have some soft lines and some hard lines.

10. The whole tree has now been done with the darkest color and you can see that it looks kind of crude you will need to come back on top of this again.
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Old 11-17-2005, 12:39 PM
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Re: Bark/Wood demonstration

11. I now just work all over the tree and add midtones and highlights just trying to really feel out the bumps and shapes of the bark.
I do a lot of scumbling with my brush just barely touching the surface of the paper.

12. OK here is the finished piece. I have come back with the airbrush and strengthed shadows and highlights on the whole piece. It does not screal airbrush but there is a lot of airbrush in this piece. I would say 60% airbrush and 40% hairybrush I hope that this is of some help to someone here. I enjoyed doing it. The finished piece by the way is 5x7 and the paints were Golden Airbrush Acrylics.
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Old 11-17-2005, 12:59 PM
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HF AIRBRUSH HF AIRBRUSH is offline
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Re: Bark/Wood demonstration

hey sam,
thanks...this looks great and it will surely help when i need to paint some wood
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Old 11-17-2005, 01:34 PM
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Re: Bark/Wood demonstration

Sam:
Wonderful demo! I know it will help me next time I do bark!!
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Old 11-17-2005, 02:20 PM
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Re: Bark/Wood demonstration

Sam,
Thanks for the demo.Thanks for sharing it with us.
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Old 11-17-2005, 06:22 PM
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Re: Bark/Wood demonstration

It's great Sam - thanks!
I'll be pointing others in this direction too ..... and you can save it for the Acrylics Class - exactly what's needed Huge thanks
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Old 11-17-2005, 06:44 PM
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Re: Bark/Wood demonstration

Sam, thank you so much for posting this. I know how much time it took for you too put it all together and upload everything. I added this thread to our helpful links while you were in the process of uploading. I didn't want to break in to post when I knew you weren't done yet.

Thank you
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Old 11-17-2005, 08:31 PM
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Re: Bark/Wood demonstration

Thanks guys for stopping in a taking a look. As I said there are lots of different ways to render barck and this is but one suggestion. Glad it will be of some help.
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Old 11-17-2005, 11:24 PM
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Re: Bark/Wood demonstration

Wow!
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Old 11-18-2005, 12:23 AM
GlenTaylor GlenTaylor is offline
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Re: Bark/Wood demonstration

Hi Sam
Thank you for the time, I will try to get the tree painted this weekend. This should help me alot.
I am amazed at the help all the artist at WC, give to the newbies, please I dont have word that can say thank you all enough.

Thank You and God Bless

Glen (SA)
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Old 11-18-2005, 06:32 AM
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Re: Bark/Wood demonstration

Very nice WIP Sam! The structure of the tree bark is really brilliant in detail.
Something to remember for the future.

Thanks for sharing.

Leon.
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Old 11-18-2005, 12:15 PM
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Re: Bark/Wood demonstration

Good demo Sam... nice to see how these things are done. Thanks for showing.
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