diff --git a/manimlib/shader_wrapper.py b/manimlib/shader_wrapper.py
index 3de2612b..da657bdd 100644
--- a/manimlib/shader_wrapper.py
+++ b/manimlib/shader_wrapper.py
@@ -446,6 +446,11 @@ class VShaderWrapper(ShaderWrapper):
                 color = texture(Texture, uv);
                 if(color.a == 0) discard;
 
+                if(color.a < 0){
+                    color.a = -color.a / (1.0 - color.a);
+                    color.rgb *= (color.a - 1);
+                }
+
                 // Counteract scaling in fill frag
                 color *= 1.06;
 
diff --git a/manimlib/shaders/textured_surface/frag.glsl b/manimlib/shaders/textured_surface/frag.glsl
index cb5f061c..de859c16 100644
--- a/manimlib/shaders/textured_surface/frag.glsl
+++ b/manimlib/shaders/textured_surface/frag.glsl
@@ -26,6 +26,7 @@ void main() {
         float alpha = smoothstep(-dark_shift, dark_shift, dp);
         color = mix(dark_color, color, alpha);
     }
+    if (color.a == 0) discard;
 
     frag_color = finalize_color(
         color,
diff --git a/requirements.txt b/requirements.txt
index 5f1eab8c..0737d3fc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ colour
 ipython>=8.18.0
 isosurfaces
 fontTools
-manimpango>=0.4.0.post0,<0.5.0
+manimpango>=0.6.0
 mapbox-earcut
 matplotlib
 moderngl