diff --git a/libs/gfx/include/psemek/gfx/mesh.hpp b/libs/gfx/include/psemek/gfx/mesh.hpp
index bbfa59b3..7a40a699 100644
--- a/libs/gfx/include/psemek/gfx/mesh.hpp
+++ b/libs/gfx/include/psemek/gfx/mesh.hpp
@@ -8,6 +8,8 @@
 #include <psemek/geom/simplex.hpp>
 #include <psemek/geom/matrix.hpp>
 
+#include <psemek/util/assert.hpp>
+
 #include <cstddef>
 #include <tuple>
 #include <type_traits>
@@ -477,10 +479,17 @@ namespace psemek::gfx
 
 		void draw() const override
 		{
-			if (count_ == 0) return;
+			draw(0, count_);
+		}
+
+		void draw(GLsizei first, GLsizei count) const
+		{
+			assert(first + count <= count_);
+
+			if (count == 0) return;
 
 			gl::BindVertexArray(array_);
-			gl::DrawArrays(primitive_type_, 0, count_);
+			gl::DrawArrays(primitive_type_, first, count);
 		}
 
 		GLsizei count() const
@@ -599,10 +608,16 @@ namespace psemek::gfx
 
 		void draw() const override
 		{
-			if (count_ == 0) return;
+			draw(0, count_);
+		}
+
+		void draw(GLsizei first, GLsizei count) const
+		{
+			if (count == 0) return;
+			assert(first + count <= count_);
 
 			gl::BindVertexArray(array_);
-			gl::DrawElements(primitive_type_, count_, index_type_, nullptr);
+			gl::DrawElements(primitive_type_, count, index_type_, reinterpret_cast<char const *>(0) + first * index_size(index_type_));
 		}
 
 		GLsizei index_count() const
@@ -628,6 +643,18 @@ namespace psemek::gfx
 		GLenum primitive_type_;
 
 		indexed_mesh(int);
+
+		static std::size_t index_size(GLenum type)
+		{
+			switch (type)
+			{
+			case gl::UNSIGNED_BYTE: return 1;
+			case gl::UNSIGNED_SHORT: return 2;
+			case gl::UNSIGNED_INT: return 4;
+			}
+			assert(false);
+			return 0;
+		}
 	};
 
 	struct instanced_mesh
@@ -737,11 +764,19 @@ namespace psemek::gfx
 
 		void draw() const override
 		{
-			if (count_ == 0) return;
-			if (instance_count_ == 0) return;
+			draw(0, count_, instance_count_);
+		}
+
+		void draw(GLsizei first, GLsizei count, GLsizei instance_count) const
+		{
+			assert(first + count <= count_);
+			assert(instance_count <= instance_count_);
+
+			if (count == 0) return;
+			if (instance_count == 0) return;
 
 			gl::BindVertexArray(array_);
-			gl::DrawArraysInstanced(primitive_type_, 0, count_, instance_count_);
+			gl::DrawArraysInstanced(primitive_type_, first, count, instance_count);
 		}
 
 		GLsizei count() const