thief-mission-viewer/project/materials/base.tres

[gd_resource type="ShaderMaterial" load_steps=2 format=3 uid="uid://ck8h6dvojuegj"]

[sub_resource type="Shader" id="Shader_eumy4"]
code = "shader_type spatial;
render_mode blend_mix,depth_draw_opaque,cull_back,unshaded;
uniform sampler2D texture_albedo : filter_linear_mipmap_anisotropic,repeat_enable;
uniform sampler2D lightmap_albedo : filter_linear_mipmap_anisotropic,repeat_enable;
uniform float lightmap_modulation;

float srgb_to_linear_e(float input) {
	float output;
	if (input <= 0.04045) {
		output = input / 12.92;
	} 
	else {
		output = pow((input + 0.055) / 1.055, 2.4);
	}
	return output;
}

vec3 srgb_to_linear(vec3 input) {
	vec3 output;
	output.r = srgb_to_linear_e(input.r);
    output.g = srgb_to_linear_e(input.g);
    output.b = srgb_to_linear_e(input.b);
	return output;
}

void fragment() {
	vec4 albedo_tex = texture(texture_albedo,UV);
	vec4 lightmap_tex = texture(lightmap_albedo,UV2) * lightmap_modulation;
	ALBEDO = srgb_to_linear((albedo_tex * lightmap_tex).rgb);
}
"

[resource]
render_priority = 0
shader = SubResource("Shader_eumy4")
shader_parameter/lightmap_modulation = 1.0