diff --git a/manimlib/shader_wrapper.py b/manimlib/shader_wrapper.py
index d4dc4889..94c6448e 100644
--- a/manimlib/shader_wrapper.py
+++ b/manimlib/shader_wrapper.py
@@ -290,9 +290,9 @@ class FillShaderWrapper(ShaderWrapper):
 
         texture_fbo.clear()
         texture_fbo.use()
-        vao.render()
+        vao.render(moderngl.TRIANGLE_STRIP)
 
         original_fbo.use()
         self.ctx.blend_func = (moderngl.ONE, moderngl.ONE_MINUS_SRC_ALPHA)
         texture_vao.render(moderngl.TRIANGLE_STRIP)
-        self.ctx.blend_func = (moderngl.DEFAULT_BLENDING)
+        self.ctx.blend_func = moderngl.DEFAULT_BLENDING