Surface detail must follow the curvature and underlying tension of muscle tissue. Beginners often draw cross-hatched scales as a flat grid across an entire limb, immediately breaking the illusion of volume. Scales, wrinkles, and plates compress on the inside of joints and stretch across outer flexor surfaces.
When painting chitin or armor plates, remember that biological shells are rarely uniform. They chip, scratch, and retain mineral deposits. Incorporate dirt accumulation inside the recesses where overlapping scales meet. Paint small parasitic barnacles or moss on older beasts to signify longevity.
Use subsurface scattering to elevate organic realism. Organic skin is partially translucent. Light penetrates the upper dermal layers, bounces off underlying capillary blood vessels, and exits at angles, casting soft red or amber glows through thin structures like ears, wing flaps, and nostril rims. Without subsurface scattering, monsters look like painted molded plastic.
