Quantum Eraser thought experiment with light photons of distinct color I tried to recreate the Quantum Eraser experiment into a thought experiment with a few changes. It left me a little perplexed as to what outcomes I should expect. Any help would be appreciated. 
Lets say you have 2 entangled photons so that when one is blue the other is always red. You shoot the 2 particles in different directions without measuring the color of the photon in either direction. Each particle, P1 and P2, hit a corresponding measuring device labeled D1 and D2. D1 only will measure the color of P1 when it hits it. D1 can also be turned on or off. When D1 measures the color of P1, P2 collapses into either red or blue state based on the measurement of P1. I assume prior to measurement from D1, P2 would be in both a red and blue state. 
Now lets say that D2 has a single slit in front of it (like you would see in the double slit experiment, just with one slit) that has a yellow film over it that could alter the color of the photon passing through it to either orange or green based on if the photon was red or blue respectively . I imagine that if D1 was turned on you would gather data on D2 of either an orange or green mark based on D1's measurement collapsing P2. However when D1 was turned off would the results on the wall at D2 change to brown dots as the photons would pass through the yellow film in both a red and blue state simultaneously? 
Any help with this is greatly appreciated.
 A: Mathematically you have a superposition of two Eigenstates and you use it because you don't know all parameters of the source. And yes, you use a probabilistic source, otherwise you will not do any experiment with it.
Using your special source you get always the next result: Measuring one of the photons you know immediately the Eigenstates of the twisted photon. Why? Because your source is made so that it produces two photons with two different colors. Look closer. It is a composed quantum dot artfully selected by us to get this result.
Does this means that the two particles after they where created are in superposition? Mathematically yes because we do not know all parametres of the quantum dot and a mathematician has no way not to act so. But that does not mean that the photons are not "finished".
I'm free to say this because the result of my thought is the same like the thought about the "spukhafte Fernwirkung" (spooky long range effect). Imagine the same experiment with two color balls. Put them into a box with two exits and two tubes. Only when one of the balls came out from one tube you will be able to "predict" the color of the second ball. The same is the mathematical model of superposition of Eigenstates but obvious it have nothing to do with some kind of spukhafte Fernwirkung.
