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kraterkid
Post Laureate


Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Making faux clay craters for sketching
      #604221 - 09/17/05 07:48 PM Attachment (126 downloads)

Hi folks,

I'm going to try to introduce a easy method to learn to draw craters without using photographs or even a telescope by creating modelling clay craters.

First start off with a ball of modelling clay about 2" in diameter. You can purchase modelling clay at most arts and crafts stores, and if you can find a gray clay buy that.

Attachment

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Rich



My CN Gallery




Edited by kraterkid (09/17/05 08:48 PM)


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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604224 - 09/17/05 07:51 PM Attachment (113 downloads)

Next flatten the clay out till it's about 1/2" thick. Notice that the clay is sitting on a piece of card board. It is really helpful to press your clay patty firmly against the board so that it will adhere to it even when placed on a wall, that way it allows you to sketch the craters from a more comfortable sitting position.

Attachment

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Rich



My CN Gallery




Edited by kraterkid (09/17/05 08:24 PM)


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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604227 - 09/17/05 07:53 PM Attachment (118 downloads)

Using a plastic bottle cap make a circular indentation in the clay.

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604229 - 09/17/05 07:56 PM Attachment (117 downloads)

Following the edges of the circular impression, use your thumb and forefinger to pinch up a rim for your crater.

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604230 - 09/17/05 07:58 PM Attachment (116 downloads)

This what it will look like when the rim is complete:

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604235 - 09/17/05 08:01 PM Attachment (120 downloads)

Now use your thumb and forefinger to pinch up a central peak.

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
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Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604237 - 09/17/05 08:03 PM Attachment (114 downloads)

Here's what it looks like now:

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604246 - 09/17/05 08:05 PM Attachment (105 downloads)

Next we'll add a small crater off to one side of the big one near the center of the clay patty. I used the rounded end of an artbrush but pencil erasers work just fine as well.

Attachment

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Rich



My CN Gallery




Edited by kraterkid (09/17/05 08:07 PM)


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kraterkid
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Reged: 03/07/05
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Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604261 - 09/17/05 08:10 PM Attachment (99 downloads)

Next we'll add another small crater like so:

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604266 - 09/17/05 08:12 PM Attachment (97 downloads)

Using the sharp end of a pencil drag it through the clay to create a sinuous rille.

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
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Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604270 - 09/17/05 08:14 PM Attachment (97 downloads)

We'll add one more small crater, this time by pressing a pencil eraser in to the clay.

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604275 - 09/17/05 08:16 PM Attachment (111 downloads)

These are the final results of our arduous 5 minutes of preparation:

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604294 - 09/17/05 08:29 PM Attachment (110 downloads)

Here is an example of how you may want to light your model. Note that the desklamp is pointed where its light will strike the surface of the model at an almost tangental angle. This will give you dramatic light and shadows, similar to what you might expect to find near the Moons' terminator.

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604302 - 09/17/05 08:34 PM Attachment (110 downloads)

When you are sketching of course, draw the shades and darken the room (the lamp will be your only light source). This is what you'll see:

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
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Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604311 - 09/17/05 08:40 PM Attachment (116 downloads)

By changing the angle of the light, you can see subtle changes in the way the light and shadows fall upon these forms. Here I've lifted the board a bit by sliding my artbrush under one side of the card, simulating the setting rays of sunlight on a waning Moon:

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604313 - 09/17/05 08:43 PM Attachment (116 downloads)

Ok, this is the setup I used to sketch this model:

Attachment

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Rich



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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604319 - 09/17/05 08:47 PM Attachment (118 downloads)

I spent 15 minutes drawing and this is my final compressed charcoal and carbon pencil sketch. It's that easy!

Attachment

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Rich



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Tim2723
The Moon Guy


Reged: 02/19/04
Posts: 5762
Loc: Northern New Jersey
Re: Making faux clay craters for sketching new [Re: kraterkid]
      #604863 - 09/18/05 09:11 AM

Rich, that's the coolest thing I've seen on CN in a long time! That's probably even better than practicing from photos.

Have you ever seen the lunar sculptures by Nasmyth and Carpenter? They did theirs from plaster and photographed them.

If this catches on, we'll have to start a sculpture forum!

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Celestron C-102HD (4" f/10 achromat)
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Sol Robbins
Carpal Tunnel


Reged: 12/01/03
Posts: 1985
Re: Making faux clay craters for sketching new [Re: Tim2723]
      #604869 - 09/18/05 09:16 AM

Hi Rich,

!DITTO!

Best,

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S.R.


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kraterkid
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Reged: 03/07/05
Posts: 4709
Loc: Jacumba, California
Re: Making faux clay craters for sketching new [Re: Sol Robbins]
      #605026 - 09/18/05 11:53 AM

Thank you guys!

I was wondering when I posted this whether it had already been discussed at CN. It was something I had started doing as a kid (wait...was I ever a kid? ) during the Apollo missions. Back then Mom used to make me homemade clay and tell me to "go make the Moon". I now see her motives, besides spurring my artistic tendencies, were to give her a break from my constant yammering about Apollo, Luna and her human guests! It was about three years later when I had ground and figured my first (and last) telescope mirror, that I really became interested in sketching at the eyepiece. My first attempt at lunar sketching was a bearly recognizable pencil sketch of the crater Copernicus. Mom, Dad and my brothers and sisters thought it was great though, and that was enough to keep me at it. During the long and sometimes boring days of summer vacation, I would make and sketch modelling clay lunar sculptures and contentedly sketch my faux versions. At night you would find me in my tin roofed, fold down observatory, happily sketching the prominent craters. Eventually, I learned to render them fairly well.

Sol, you might be interested to know that my sketches of Mars during the opposition of 1971 presented at the Greater San Diego Science Fair allowed me to meet a Nasa Engineer, Gene Ball, who worked at JPL. They really liked my sketches, showing me comparison images of the features I drew and explaining how dust storms or clouds were obscuring areas where I showed little detail. I received the Nasa Award which included an autographed copy of "The Mariner 6 and 7 Pictures of Mars" which I will always cherish.

Thanks again,
Rich

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Rich



My CN Gallery




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