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Simply so, why does my paint crack when it dries?

Cracked paint can have a number of causes. For example, mud cracks usually indicate that too many layers of paint were applied on the surface or the wall was dirty. More severe problems, such as alligator cracks, are caused when a second or third coat of paint is applied before the previous coat has dried.

Similarly, why did my acrylic painting crack? Even acrylic paints, primers and gel mediums can crack. Another reason paint layers may crack is because the underlying materials are swelling up, pushing against the less elastic layer. At some point the stiffer paint has to give, and it creates a cracked surface.

Also, how do you keep paint from cracking?

How to Prevent Paint from Cracking or Flaking

1. Take care prepping surfaces before painting: Only apply paint to surfaces that have been properly sanded, cleaned, and primed.
2. Never paint over cracked paint.
3. Allow paint to dry thoroughly before adding another coat.

How do you keep thick acrylic paint from cracking?

How to prevent crazing in acrylic pours:

1. 1) Use a good quality pouring medium. A good quality pouring medium can help keep your acrylic pour from cracking once dried.
2. 2) Avoid diluting your acrylic pouring mix with too much water.
3. 3) Work in a dry, room temperature environment.
4. 4) Apply any finishing varnishes only after your artwork has completely dried.