Blending textures in specific locations of a material

[DankP3]

Noob question, which I have illustrated with a picture:

I have made a composite texture (blue) and I can extract the regions I want (green).
Is it possible to merge the selected images back together into a material, but in specific locations (as shown in red with the creation of a specific number from the 3 integers)?

If this functionality exists, perhaps someone could kindly point me in the direction of the nodes I would need for this?

I am inexperienced with textures/materials but will figure it our given time…

Thanks for thoughts.

[phoboz]

If you just want them blended with each other, sample all of them and use Add node.

If you want to apply them individually in particular places you will probably need a combination of TextureCoordinate node (to get the position you currently render to) and If nodes (to filter what should be rendered).

Here’s a sample material that renders 3 stripes, changing color based on the coordinates

[DankP3]

Thankyou for your response. So if I understand correctly, my three images (or numbers in the example) will be cleaved into thirds and I will get a third of each number if I follow your stripe example, which is not what I am after. Do I understand correctly?

Ideally, I want to scale my 3 images down and place them at precise locations/coordinates in the resultant material?

[phoboz]

It was just to present the idea of how to approach it. Here’s a ready solution.

This is a demonstration so you know what is going on (I duplicated some nodes for readability)

Here’s the same functionality, only put into a MaterialFunction

Finally, put together

[DankP3]

Thankyou for you this. It will take me a little while to run through this with my images and see how it works, but I appreciate the efforts.

[Luos (Luos_83)]

Hello Dank, you might also want to look at this: UE4 - Advanced Mask Texture Optimisation Tutorial - YouTube
Its a way to mask parts of a texture, it might give you some additional insight on potential possibilities!

[DankP3]

OK, thank you both for your help.
Luos, your instruction was helpful and in the end I was able to create mask (and mathematically modify the masks when objects were overlapping) to allow me to position non-merged overlapping images where I liked in the material.
I have another issue of getting from the an individual component in a texture object compilation identified via subUV_function (the first step mentioned in my original question) to this step, but if I can’t figure that out for myself I figure that is a different question. Thanks again.