LearnOpenGL/src/1.getting_started/4.3.textures_exercise1/textures_exercise1.cpp

#version 330 core
out vec4 FragColor;

in vec3 ourColor;
in vec2 TexCoord;

uniform sampler2D ourTexture1;
uniform sampler2D ourTexture2;

void main()
{
    FragColor = mix(texture(ourTexture1, TexCoord), texture(ourTexture2, vec2(1.0 - TexCoord.x, TexCoord.y)), 0.2);
}