source: data/data_extern/programs/GLSL120/Example_TextureArrayPS.glsl

#version 120
#extension GL_EXT_texture_array : enable

uniform sampler2DArray TextureArrayTex;
varying vec3 oUv;

void main(void)
{
        vec3 texcoord;
        texcoord = oUv;
        texcoord.z = floor(texcoord.z);
    vec4 c0 = texture2DArray(TextureArrayTex, texcoord);
        texcoord.z += 1.0;
    vec4 c1 = texture2DArray(TextureArrayTex, texcoord);

        gl_FragColor = mix(c0, c1, fract(oUv.z));
}