[4.4 dev7] Fonts using Multichannel Signed Distance Fields break when used in Label3D

[AbsoluteMoose]

Tested versions

Reproducible in: 4.4 dev7
Not reproducible in: 4.4 dev6 and earlier

System information

Godot v4.4.dev7.mono - Windows 10 (build 19045) - Multi-window, 2 monitors - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 4070 Ti (NVIDIA; 32.0.15.6590) - 13th Gen Intel(R) Core(TM) i7-13700K (24 threads)

Issue description

In Label3D nodes using a font with Multi Channel Signed Distance Fields turned on in import or project settings, all characters show up as grey boxes.

The following error also appears in the Output tab:

ERROR: :53 - Unknown identifier in expression: 'albedo_texture_size'.
ERROR: Shader compilation failed.
--Main Shader--
1 | // NOTE: Shader automatically converted from Godot Engine 4.4.dev7.mono's StandardMaterial3D.
2 |
3 | shader_type spatial;
4 | render_mode blend_mix, depth_draw_opaque, cull_back, diffuse_burley, specular_schlick_ggx;
5 |
6 | uniform vec4 albedo : source_color;
7 | uniform sampler2D texture_albedo : source_color, filter_linear_mipmap, repeat_enable;
8 |
9 | uniform float msdf_pixel_range : hint_range(1.0, 100.0, 1.0);
10 | uniform float msdf_outline_size : hint_range(0.0, 250.0, 1.0);
11 | uniform float alpha_scissor_threshold : hint_range(0.0, 1.0, 0.001);
12 | uniform float point_size : hint_range(0.1, 128.0, 0.1);
13 |
14 | uniform float roughness : hint_range(0.0, 1.0);
15 | uniform sampler2D texture_metallic : hint_default_white, filter_linear_mipmap, repeat_enable;
16 | uniform vec4 metallic_texture_channel;
17 | uniform sampler2D texture_roughness : hint_roughness_r, filter_linear_mipmap, repeat_enable;
18 |
19 | uniform float specular : hint_range(0.0, 1.0, 0.01);
20 | uniform float metallic : hint_range(0.0, 1.0, 0.01);
21 |
22 | uniform vec3 uv1_scale;
23 | uniform vec3 uv1_offset;
24 | uniform vec3 uv2_scale;
25 | uniform vec3 uv2_offset;
26 |
27 | void vertex() {
28 | // Vertex Color is sRGB: Enabled
29 | if (!OUTPUT_IS_SRGB) {
30 | COLOR.rgb = mix(
31 | pow((COLOR.rgb + vec3(0.055)) * (1.0 / (1.0 + 0.055)), vec3(2.4)),
32 | COLOR.rgb * (1.0 / 12.92),
33 | lessThan(COLOR.rgb, vec3(0.04045)));
34 | }
35 |
36 | UV = UV * uv1_scale.xy + uv1_offset.xy;
37 | }
38 |
39 | float msdf_median(float r, float g, float b, float a) {
40 | return min(max(min(r, g), min(max(r, g), b)), a);
41 | }
42 |
43 | void fragment() {
44 | vec2 base_uv = UV;
45 |
46 | vec4 albedo_tex = texture(texture_albedo, base_uv);
47 |
48 | {
49 | // Albedo Texture MSDF: Enabled
50 | albedo_tex.rgb = mix(
51 | vec3(1.0 + 0.055) * pow(albedo_tex.rgb, vec3(1.0 / 2.4)) - vec3(0.055),
52 | vec3(12.92) * albedo_tex.rgb,
53 | lessThan(albedo_tex.rgb, vec3(0.0031308)));
E 54-> vec2 msdf_size = vec2(msdf_pixel_range) / vec2(albedo_texture_size));
55 | vec2 dest_size = vec2(1.0) / fwidth(base_uv);
56 |
57 | float px_size = max(0.5 * dot(msdf_size, dest_size), 1.0);
58 | float d = msdf_median(albedo_tex.r, albedo_tex.g, albedo_tex.b, albedo_tex.a) - 0.5;
59 | if (msdf_outline_size > 0.0) {
60 | float cr = clamp(msdf_outline_size, 0.0, msdf_pixel_range / 2.0) / msdf_pixel_range;
61 | albedo_tex.a = clamp((d + cr) * px_size, 0.0, 1.0);
62 | } else {
63 | albedo_tex.a = clamp(d * px_size + 0.5, 0.0, 1.0);
64 | }
65 | albedo_tex.rgb = vec3(1.0);
66 | }
67 |
68 | // Vertex Color Use as Albedo: Enabled
69 | albedo_tex *= COLOR;
70 |
71 | ALBEDO = albedo.rgb * albedo_tex.rgb;
72 |
73 | float metallic_tex = dot(texture(texture_metallic, base_uv), metallic_texture_channel);
74 | METALLIC = metallic_tex * metallic;
75 | SPECULAR = specular;
76 |
77 | vec4 roughness_texture_channel = vec4(1.0, 0.0, 0.0, 0.0);
78 | float roughness_tex = dot(texture(texture_roughness, base_uv), roughness_texture_channel);
79 | ROUGHNESS = roughness_tex * roughness;
80 | ALPHA *= albedo.a * albedo_tex.a;
81 | ALPHA_SCISSOR_THRESHOLD = alpha_scissor_threshold;
82 | }
83 |

Steps to reproduce

• Create a new project

• Create a scene containing a Label3D node given some text

• Import a font file with Multichannel Signed Distance Fields set to true

• Assign this font to the Label3D node

OR

• Enter project settings
• Set gui/theme/default_font_multichannel_signed_distance_field to true
• Save and restart

Minimal reproduction project (MRP)

minimalreproductionprojectlabel3d.zip

[clayjohn]

Thank you for your report.

This has already been fixed by #100678!