SciFi Hologram

KubikPixel July 9, 2021January 23, 2023

A simple tweakeble SciFi Hologram spatial shader for 3D objects.

High customizable
Over twelve parameters
Full procedural
Full animated
Optional textures for more details
Flickering
Interrupts
Separated Fresnel color
Individual speeds of each part
Two different scan lines
Work with any 3D model
GLES3

Shader code

shader_type spatial;
render_mode unshaded;

uniform sampler2D texture_image;

uniform mediump vec4 line_color : hint_color = vec4(0.0, 1.0, 0.0, 1.0);
uniform mediump float line_width : hint_range(0, 1) = 0.005;
uniform mediump float line_blur : hint_range(0, 1) = 0.2;
uniform mediump float line_speed : hint_range(-1, 1) = 0.02;
uniform  bool straight_lines = true;

uniform mediump float interrupt_width : hint_range(0, 1) = 0.5;
uniform mediump float interrupt_blur : hint_range(0, 1) = 0.25;
uniform mediump float interrupt_speed : hint_range(-1, 1) = 0.2;

uniform mediump vec4 glow_color : hint_color = vec4(0.5, 0.75, 1.0, 1.0);
uniform lowp float glow_itensity : hint_range(0, 20) = 4.5;
uniform lowp float glow_amount : hint_range(0, 20) = 4.5;
uniform lowp float flickering : hint_range(0, 1) = 0.55;

vec3 fresnel_glow(float amount, float intensity, vec3 color, vec3 normal, vec3 view) {
	return pow((1.0 - dot(normalize(normal), normalize(view))), amount) * color * intensity;
}

void fragment () {
	vec2 canvas;
	if (straight_lines) {
			canvas = SCREEN_UV;
	} else {
		canvas = vec2(VIEW.x, VIEW.y);
	}
	vec2 lines = vec2(clamp(sin((TIME * line_speed + canvas.y) / line_width), line_blur, 1.0 - line_blur), canvas.x);
	vec2 interupts = vec2(clamp(sin((TIME * interrupt_speed + canvas.y) / interrupt_width * 3.0), interrupt_blur, 1.0 - interrupt_blur), canvas.x);
	
	float flicker = clamp(fract(cos(TIME) * 43758.5453123), flickering, 1.0);
	vec4 imgtex = flicker * line_color * texture(texture_image, lines * interupts);
	vec3 imgtex_color = vec3(imgtex.r, imgtex.g, imgtex.b);
	vec3 fresnel_color = vec3(glow_color.r, glow_color.g, glow_color.b);
	vec3 fresnel = fresnel_glow(glow_amount, glow_itensity, fresnel_color, NORMAL, VIEW);
	ALBEDO = imgtex_color + fresnel;
	
	//ALBEDO = vec3(imgtex.r, imgtex.g, imgtex.b);
	EMISSION = glow_amount * vec3(glow_color.r, glow_color.g, glow_color.b);
	ALPHA = lines.x * interupts.x;
}