This procedure is called tweening

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The cel was exposed through the negative. This process is impact cratering. Models are in the exhibits at Lava Beds National Monument. Sometimes, small statues known as maquettes may be produced, so that an animator can see what a character looks like in three dimensions. Plant roots do the same thing as well.

Photomatics are another option when creating test spots, but instead of using drawn artwork, there is a shoot in which hundreds of digital photographs are taken. It is the largest volcano on the Earth.

Even Venus with its thick atmosphere has impact craters, though they all have diameters measured in kilometers because smaller projecticles burn up in its atmosphere. Careful studies of how the craters overlap other craters and other features can be used to develop a history or sequence of the bombardment on the moons and planets.

It is noteworthy that about the time the heavy bombardment ended, life took hold. When these rivers of ice merge with other glaciers, one individual glacier's lateral moraine can merge with another glacier's lateral moraine to make a medial moraine. As the metallic core cooled, it shrank and the mantle and brittle crust would have had to shrink too, crinkling in the process. Much of Venus is covered in lava plains. The number of craters per unit area on a surface can be used to determine an approximate age for the planet or moon surface if there is no erosion.

White and blue toners were used for special effects, such as snow and water. The explosion is what carves out the crater so almost all craters are round otherwise the great majority would be oblong in shape. It is attached to the animation desk or light table, depending on which is being used. All of the tributaries suggest that methane rainfall is effectively eroding the surface.

Next, a cel with detailed black lines was laid directly over it, each line drawn to add more information to the underlying shape or figure and give the background the complexity it needed. Glacial moraines form from gravel transported by glaciers. All bodies with hard surfaces have impact craters. The resulting drawings are again pencil-tested and sweatboxed until they meet approval.

White and blue tonersThe explosion is what carves

The film frames were then printed on paper, showing a model made up of the painted black lines. Gradually, motion control techniques were adopted throughout the industry. Like rotoscoping, this method is rarely used, but when it is, it can be done to terrific effect, immersing the audience in a fantasy world where humans and cartoons co-exist. Aine Corona on Venus as seen by Magellan. It displays the classic terraced crater walls and central peak of a complex crater.