If I setup a white Constant TOP with a size 100x100 and Composite TOP over a 256x256 Constant with Alpha at 0 and size set to Native and send that out NDI, turn on alpha, I get a white box with a black background in NDI Studio Monitor.
If I setup a Noise TOP and use a Composite TOP to subtract the noise from something else and send that out NDI and look in NDI Studio Monitor I get nothing. Just pure alpha, not the noise cut alpha I am seeing in Touch Designer.
What am I doing wrong? Why does one alpha work but the other doesn’t?
The signal works if I bring it back into Touch Designer but into my other NDI devices things aren’t working.
the default settings for the Noise TOP create a noise in rgb and a alpha value of 1. When you subtract that from another texture with an alpha value of 1, the resulting alpha will be 0.
to see the alpha value of each texture, you can either activate the viewer of a TOP operator and select the alpha channel or switch on “Normalized Split” to see all channels (rgba) in a single grid view.
That makes sense, and I should have looked at that but now my question is why does it look like there’s transparency there? How do I get the alpha to match what I am seeing that looks like transparency?
our viewers show color values and alpha at the same time - the color values are by default not multiplied with the alpha value.
reorder is a perfect use case for this.
