Code adopted from Complementary shaders (https://www.curseforge.com/minecraft/customization/complementary-shaders)

gbuffers_damagedblock.fsh

#version 120
/* DRAWBUFFERS:02 */ //0=gcolor, 2=gnormal for normals

//Varyings//
varying vec2 texCoord;

//Uniforms//
uniform sampler2D texture;

//Program//
void main() {
	//Texture
	vec4 albedo = texture2D(texture, texCoord);

	#if ALPHA_BLEND == 1
	albedo.rgb = pow(albedo.rgb,vec3(2.2)) * 2.25;
	#endif
	
	#ifdef WHITE_WORLD
	albedo.a = 0.0;
	#endif
	
    /* DRAWBUFFERS:0 */
	gl_FragData[0] = albedo;
}