diff -r 121a40d5e34c -r 8e1c9f18ae15 src/gl/gridprogram.cpp
--- a/src/gl/gridprogram.cpp	Tue Jul 27 13:23:34 2021 +0300
+++ b/src/gl/gridprogram.cpp	Tue Jul 27 16:29:00 2021 +0300
@@ -121,3 +121,8 @@
 {
 	return GL_QUADS;
 }
+
+QOpenGLBuffer::UsagePattern GridProgram::usagePattern() const
+{
+	return QOpenGLBuffer::StaticDraw;
+}