SuperTuxKart 1.5 upstream source (from official release tarball)

data/shaders/ge_shaders/alphatest_depth.frag

@@ -0,0 +1,12 @@
+layout(location = 0) in vec4 f_vertex_color;
+layout(location = 1) in vec2 f_uv;
+layout(location = 3) flat in int f_material_id;
+
+#include "utils/sample_mesh_texture.glsl"
+
+void main()
+{
+    vec4 tex_color = sampleMeshTexture0(f_material_id, f_uv);
+    if (tex_color.a * f_vertex_color.a < 0.5)
+        discard;
+}