Vertex Displacement/Height Material

This shader is finished!

Features:

  • Physically Based Rendering (PBR)
  • Grouped Variables
  • Displacement/Height UV separate from UV1 (For terrain-like things just incase the texture is repeatitive)

Limitations (for now):

  • Displacement/Height works intended only on Y looking plane
  • No self-shadowing (don’t know how to do this)

I was surprised to see that there’s absolutely no shader that makes displacement look real. I mean, all of them were just something like a projection of a parallax displacement into a flat vertex. And, because of this, i decided to create a shader of my own, based off this shader (there’s probably little to no remnants left that remind of this shader), and i managed to fit all this into less than 50 lines of code (before the Displacement UV arrived), which is surprising because i never made any shader myself!

In order to make this shader work, you must:

  1. Subdivide your mesh by any value you want (the more subdivisions the more detail and the less FPS)
  2. Mess around with Height UV Scale Z to anything between 0.0 and 0.32 and see which value works best
Shader code
shader_type spatial;
render_mode blend_mix,depth_draw_opaque,cull_back;

group_uniforms Albedo;
uniform vec4 albedo : source_color;
uniform vec3 emission: source_color;
uniform sampler2D texture_emission : source_color,filter_linear_mipmap,repeat_enable;
uniform sampler2D texture_albedo : source_color,filter_linear_mipmap,repeat_enable;
group_uniforms;
group_uniforms AmbientOcclusion;
uniform sampler2D texture_ao : source_color,filter_linear_mipmap,repeat_enable;
uniform float ao_light_affect : hint_range(0.0, 1.0, 0.01);
group_uniforms;
group_uniforms Reflectivity;
uniform sampler2D texture_roughness : source_color,filter_linear_mipmap,repeat_enable,hint_roughness_gray;
uniform sampler2D texture_metallic : source_color,filter_linear_mipmap,repeat_enable;
uniform float material_specular: hint_range(0.0, 1.0);
uniform float roughness: hint_range(0.0, 1.0);
group_uniforms;
group_uniforms HeightMap;
uniform sampler2D texture_height : source_color,filter_linear_mipmap,repeat_enable;
group_uniforms;
group_uniforms Normal;
uniform sampler2D texture_normal : filter_linear,repeat_enable;
uniform float normal_scale : hint_range(-16,16);
group_uniforms;
group_uniforms UV1;
uniform vec3 uv1_scale = vec3(1.0, 1.0, 1.0);
uniform vec3 uv1_offset = vec3(1.0, 1.0, 1.0);
group_uniforms;
group_uniforms HeightMapUV;
uniform vec3 hmUV_scale = vec3(1.0, 1.0, 0.08);
uniform vec3 hmUV_offset = vec3(1.0, 1.0, 1.0);
group_uniforms;


void vertex() {
	vec2 hmUV = UV * hmUV_scale.xy + hmUV_offset.xy;
	UV=UV*uv1_scale.xy+uv1_offset.xy;
	VERTEX.y -= (texture(texture_height, hmUV).g - hmUV_offset.z) * -hmUV_scale.z;
}

void fragment() {
	vec4 albedo_tex = texture(texture_albedo,UV);
	ALBEDO = albedo.rgb * albedo_tex.rgb;
	ROUGHNESS = texture(texture_roughness, UV).g * roughness;
	SPECULAR = material_specular;
	METALLIC = texture(texture_metallic, UV).g;
	NORMAL_MAP = texture(texture_normal,UV).xyz;
	NORMAL_MAP_DEPTH = normal_scale;
	EMISSION = texture(texture_emission,UV).rgb * emission.rgb;
	AO = texture(texture_ao,UV).g;
	AO_LIGHT_AFFECT = ao_light_affect;
}
Tags
displacement, height, parallax
The shader code and all code snippets in this post are under CC0 license and can be used freely without the author's permission. Images and videos, and assets depicted in those, do not fall under this license. For more info, see our License terms.

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