Scale each square of the Vector noise by individual origins??

melviso

Is it possible to create individual origins for each square in the vector noise node in the material editor and be able to scale them by each square origins in ue4 or ue5 equally?
This is possible with the tile sampler node in a lot of 2d texture authoring softwares like designer, Texture lab, material maker e.t.c. Wonder if ue4 does the same.

Axi5

It's a bit tricky working out the desired effect, can you show an end result that you're trying to reach?

Obscura

Sure possible. But you wouldnt scale the squares themselves. More like creating a mask  for them, where the tile size is adjustable. it would go like:

Take a 2d coordinate that has the same vector length as the xy elements of the noise grid. so in this case, it goes to 5,5. then put frac on this, and subtract 0.5. then put an abs, and then another subtract that will set the "tile size" for each of them. a ceil node after this, then break float2, max the x and y, and put one-minus on the result, and a saturate. Then multiply this on your noise and you have the adjustable tile size for them.

melviso

@Obscura Thanks a ton, Obscura. You are awesome, mate.


Got it to work but I was trying to see if I could use the cellnoise vector scaling to drive the scale of the indiviual tiles of a tiled image texture. Unfortunately, with the mask method, didn't work.

@Axi5 This is what I am trying to do in unreal engine:

Should have posted this in the beginning. This is from Texturelab. 

Obscura

I see no reason why you couldnt do that. You just need to do it differently

Obscura

Obscura

Feeding grayscale or vector noise into the scale and subtract would make it being able to have different scale per tile but it has to be sampled on a similar grid. With vector noise, this is simple and you just multiply the incoming coordinates of it by the number of cells you want to get. With grayscale noise, its slightly different and it goes like this:


Non uniform size with vector noise:


Non uniform position offset with vector noise:


If you want the tiles to be able to overlap each other, you will need to look into how to construct a voronoi grid.

Obscura

Also, I just noticed that the scale uv returns a 0-1 mask so you could replace the masking like this:

This gives the same result.

melviso

Thanks so much, Obscura.

 Obscura said:

If you want the tiles to be able to overlap each other, you will need to look into how to construct a voronoi grid.

Thanks. I will like to have the tiles overlap as well. The vector noise has a voronoi noise or would this require a different one?

Obscura

Have you tried the texture bombing function?

melviso

Yes but I am trying to create patterns not texture randomizations with the bombing you loose the patterns completely as they are all over the place. Currently we can have tiles pattern with space between them which is awesome, thanks so much but if it can also have them overlap at the edge while keeping the pattern intact in the middle, that would be great.

I am currently trying to look up constructing voronoi grid for ue4. I am wondering if it could be all squares as well

Obscura

It would be a pretty big material. you would need to check the 8 neighbour cells and blend them. Are you sure you cant have this in a static way, like made in substance, and then exported as a texture?

poopipe

this is the closest thing I've seen to what you're looking for. 
https://drive.google.com/file/d/1QecekuuyWgw68HU9tg6ENfrCTCVIjm6l/view

it's a long way from straightforward to implement - you can get away with linear blending though for a lot of cases

melviso

@Obscura It would be a big material? Well, then, I will have to drop it. 
EDIT: In the examples above.

@poopipe Interesting read. Thanks for the link .Yeah but the histogram_preserving blending looks way better though. This can't be implemented in ue4 I am guessing.

Obscura

I did exactly that in one of the examples i posted above.

melviso

Yeah you did. Thank you so much for all the help.

melviso

Obscura said:

It would be a pretty big material. you would need to check the 8 neighbour cells and blend them. 

PIs is it possible for them to overlap without any sort of blending? Would that reduce the size of the material?

poopipe

the complexity comes from checking the neighbours, not the blending 

melviso

@poopipe Thanks for the info. In that case, I think its okay the way its then and thank you for the suggestions.

@Obscura Appreciate all the nodes setup. I am very grateful. Thank you.