it doesn’t work with the blendable location you have selected. that should output a warning in the log. luckily i got that. as tested, after tonemapping the stencil is kinda cluttered. you can see that if you display it directly. but… it still works somehow. kinda like a query. means… if any pixel hits the stencil condition. it applies the ppm to the whole screen. maybe a cheat for some form of game or graphics logic.