I want to achieve a parchment with writing on it, where the 1. letter has a different material (glossy shader, gold) than the others.
The scene consists of a plane which has a node setup to show parchment, then on this plane I add 2 Image Textures, alpha mapped png, one containing only the first letters, the 2nd only containing the text without the first letters.
The individual layers render correctly, but I have a problem combining the two alpha maps.
Here is my node setup for the alpha mapping (the pink rectangle is only a help to see the black writing and check that the alpha mapping works correctly):
Now, I would have expected that combining the two alpha maps with a Add shader would do the trick:
As you can see, the 1st letters seem ok, but the text is half transparent. Obviously the Add shader multiplies the alpha with the text, which is not what I want. I want completely opaque letters.
I tried the Mix shader, but gave similiar results. I tried to use an rgb-add node, but this gave a completely black paper no matter which mode I selected.
In these renders I ignored the parchment layer.
Can anybody help me with this?