DemoRenderList.cs

using StereoKit;

class DemoRenderList : ITest
{
	string title       = "Render Lists";
	string description = "All draw calls are stored in RenderList.Primary, but you can also store your draw calls to custom RenderLists! This allows you to draw more specific scenes to render textures with greater control, for use as icons, thumbnails, and all sorts of interesting things!";

	Tex        renderTex = Tex.RenderTarget(128, 128);
	Material   renderMat = Material.Unlit.Copy();
	RenderList list      = new RenderList();

	public void Step()
	{
		ShowRenderListWindow();

		Demo.ShowSummary(title, description, new Bounds(V.XY0(0, -0.105f), V.XYZ(.2f, .31f, 0)));
	}

	public void Initialize()
	{
		winPose = (Demo.contentPose * winPose.ToMatrix()).Pose;

		Model model = Model.FromFile("DamagedHelmet.gltf");
		Assets.BlockUntil(model, AssetState.Loaded);
		list.Add(model, Matrix.R(0,180,0), Color.White);

		renderMat[MatParamName.DiffuseTex] = renderTex;
	}
	public void Shutdown() { }

	Pose winPose = Pose.Identity;
	bool clear   = false;
	void ShowRenderListWindow()
	{
		list.DrawNow(renderTex, Matrix.LookAt(Vec3.AngleXZ(Time.Totalf * 90, 0.2f) * 2.0f, Vec3.Zero, Vec3.Up), Matrix.Perspective(90, 1, 0.01f, 50), Color.HSV(0.4f, 0.3f, 0.5f));

		UI.WindowBegin("Render Lists", ref winPose);
		UI.Label($"Render items: {RenderList.Primary.PrevCount}");
		UI.Toggle("Clear", ref clear);

		UI.Label("Offscreen List:");
		Bounds b = UI.LayoutReserve(new Vec2(0.1f, 0.1f));
		Mesh.Quad.Draw(renderMat, Matrix.TS(b.center + Vec3.Forward *0.004f, b.dimensions.XY1));
		UI.WindowEnd();

		if (clear) RenderList.Primary.Clear();
	}
}