improve visuals

client/src/main/resources/shaders/world.vsh

@@ -22,7 +22,7 @@ uniform bool shade;
 void main() {
 	vec3 nvertex = vec3(model * vec4(pos, 1.0));
 	vertex = vec3(float(chunk_x) + pos.x, float(chunk_y) + pos.y, float(chunk_z) + pos.z);
-	shading = shade ? (norm.x != 0.0 ? 0.6 : (norm.z != 0.0 ? 0.8 : (norm.y < 0.0 ? 0.5 : 1.0))) : 1.0;
+	shading = shade ? (norm.x != 0.0 ? 0.6 : (norm.z != 0.0 ? 0.8 : (norm.y > 0.0 ? 0.5 : 1.0))) : 1.0;
 	normal = mat3(transpose(inverse(model))) * norm.xyz;
 	shine = norm.a * 32.0;
 	tex_coord = coord;