It could be the way the shading and highlighting are done. Maybe the artist uses a lot of light colors and soft strokes to give that transparent effect.
Often, it's a combination of factors. The choice of colors, the way light is depicted hitting the eyes, and the level of detail in the drawing can all contribute to making brown eyes look transparent in cartoons.
Well, it could be the shape and size of the eyes. Round eyes with upturned corners give a happy look. Also, adding sparkles or stars in the eyes can suggest happiness. The expression of the eyebrows can play a role too, arched eyebrows can make the eyes seem happy.
Often, it's the artist's use of light and shadow. They might add a glint or a twinkle to the eyes to give that sparkling effect. Also, the shape and size of the eyes can contribute to making them look sparkling.
It could be due to the use of special animation techniques or specific drawing styles.
It could be the use of light and shading techniques. Maybe the artist uses a lot of white or light colors to give the impression of transparency.
Maybe it's because of the choice of colors or the way light is depicted. Transparency in big cartoon eyes might be achieved by using light and soft tones, or by showing a hint of what's behind the eyes.
It could be the use of certain colors or shading techniques that give the illusion of transparency.
Well, one reason could be the choice of colors. Using light, transparent tones or layering them in a specific way can make the fist appear transparent. Also, the way the lines are drawn and the level of detail can contribute to that effect.
The use of light and color plays a big role. Clear blues and whites, along with proper shading, can give that transparent effect.
Well, a cartoon tooth might look transparent when the artist uses thin lines and light tones. Also, adding a background that shows through the tooth can create the illusion of transparency. Sometimes, special effects like glows or blurs contribute to it too.
It could be the way the light is hitting it or the colors used to depict it.