3D Burning with Direction
This shader is adapted by the 2D Burn Dissolve With Direction Shader
Please check out his stuff it’s great. his name is enekoassets
While the shader isn’t perfect it does what it needs to do.
Just add a shader material to an object and tweak the settings around.
Shader code
shader_type spatial;
uniform float progress : hint_range(0.0, 1.0) = 0.0;
uniform float noiseForce : hint_range(0.0, 1.0) = 0.2;
uniform sampler2D noiseTexture;
uniform vec4 burnColor : source_color = vec4(1.0, 0.3, 0.0, 1.0);
uniform float borderWidth : hint_range(0.0, 0.5) = 0.1;
uniform float direction : hint_range(0.0, 360.0) = 180.0;
uniform sampler2D albedo_texture : source_color;
uniform float burn_axis : hint_range(0.0, 2.0) = 1.0;
uniform bool cylindrical_burn = true;
uniform float ash_alpha : hint_range(0.0, 1.0) = 0.3;
uniform vec3 ash_color : source_color = vec3(0.3, 0.3, 0.3);
varying vec3 world_position;
varying vec3 local_position;
void vertex() {
world_position = VERTEX;
local_position = VERTEX;
}
void fragment(){
vec4 base_color = texture(albedo_texture, UV);
float burn_progress;
if (cylindrical_burn) {
burn_progress = local_position.y;
} else {
if (burn_axis < 0.5) {
burn_progress = local_position.x;
} else if (burn_axis < 1.5) {
burn_progress = local_position.y;
} else {
burn_progress = local_position.z;
}
}
burn_progress = (burn_progress + 1.0) * 0.5;
float noise_sample = texture(noiseTexture, UV).r;
float burn_line = burn_progress + (noise_sample * noiseForce);
bool is_burned = burn_line < progress;
bool is_border = burn_line < (progress + borderWidth);
vec3 final_albedo;
float final_alpha;
if (is_burned) {
final_albedo = ash_color;
final_alpha = ash_alpha;
} else if (is_border) {
float burn_mix = (progress + borderWidth - burn_line) / borderWidth;
final_albedo = mix(base_color.rgb, burnColor.rgb, burn_mix);
final_alpha = 1.0;
} else {
final_albedo = base_color.rgb;
final_alpha = base_color.a;
}
ALBEDO = final_albedo;
ALPHA = final_alpha;
if (is_border && !is_burned) {
float burn_mix = (progress + borderWidth - burn_line) / borderWidth;
EMISSION = burnColor.rgb * burn_mix * 0.5;
}
}