Metallic Foil Texture

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Espermaschine
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Metallic Foil Texture

Postby Espermaschine » Wed Mar 16, 2016 5:09 am

I wrote a tutorial on how to make goldfoil texture in Gimp that you can use to give your vector elements a shiny look.

http://gimp-science-labs.blogspot.de/20 ... dfoil.html

Image

Lazur
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Re: Metallic Foil Texture

Postby Lazur » Wed Mar 16, 2016 5:27 am

Nice one!

Just curious if you have tried inkscape's filter editor for the same look.

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Espermaschine
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Re: Metallic Foil Texture

Postby Espermaschine » Wed Mar 16, 2016 6:33 am

Thanks !

No, i havent.

1. I think the IS filters in its current form are not very useful.
2. I've watched several tutorials that mixed vector and raster and i think focusing on a mindset that everything has to be scalable and live is an aberration and causes harm to creativity.
3. My blog was set up for Gimp in the first place and i dont want to deviate too much from that. Still i think mixing Gimp and IS can lead to many new exciting possibilities.

Lazur
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Re: Metallic Foil Texture

Postby Lazur » Wed Mar 16, 2016 7:10 am

I see your point that filters are targeting the raster format and a raster editor is more spot on.
On the other hand, using a filter editor you can tweak the filter's settings and don't have to repeat each step if you want to achieve the same look with another image.
Not everything has to be live, it's just an option.

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Espermaschine
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Re: Metallic Foil Texture

Postby Espermaschine » Wed Mar 16, 2016 7:37 am

Touchè

Problem is, you are so far ahead in this game, barely anybody can follow you.
Looking at the filter editor, it looks so alien i dont even know where to begin...

And as long as we get a million noobs each month who dislike doing their homework, and none of the veterans are interested in anything that happens beyond that, where does this community head to ?

Do you know how many experienced gimpers cant do shit without a "tut" ?!

Lazur
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Re: Metallic Foil Texture

Postby Lazur » Wed Mar 16, 2016 8:07 am

I have no idea.
Always thought of it as self explanatory. You hit some buttons and get a certain look, then memorize the effect and use it where necessary.
(Usually I get carried away by that, even when creating a grunge pattern though.)

Tried to screen capture filter editing before but it crashed inkscape. Once I can make that work, videos will come.

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Espermaschine
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Re: Metallic Foil Texture

Postby Espermaschine » Wed Mar 16, 2016 8:24 am

Mmmh. Im not clear on how you started your textures.
The filter editor doesnt seem to give a clue.

Does it matter what color your initial rectangle has ?

Lazur
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Re: Metallic Foil Texture

Postby Lazur » Wed Mar 16, 2016 8:49 am

Could get it work gladly:

filter editing
-without editing the video, sorry for any confusing actions-

It depends on how you set up the filter. But for that filter pack it didn't matter what were the original colours of the objects, only aplha values were used.


Edit: here is the finished svg:
gold filtr recorded.svg
(6.74 KiB) Downloaded 61 times

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Espermaschine
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Re: Metallic Foil Texture

Postby Espermaschine » Wed Mar 16, 2016 9:16 am

This is better than StarTrek...

"Mr. Lazur, engage the turbulence matrix and set octaves to 2 point zero"

I thought you start with a filter form the list and then play around with the values. Instead you start from scratch :shock:

What software did you use to record your desktop ?

EDIT: oh wow you can even have the filter active while typing in text :geek:

Lazur
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Re: Metallic Foil Texture

Postby Lazur » Wed Mar 16, 2016 9:28 am

Used sharex.

Started from scratch as I don't know each of the buil in filters, hardly use them now.
Seems easier making a custom one than finding out which setting to modify.

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Espermaschine
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Re: Metallic Foil Texture

Postby Espermaschine » Wed Mar 16, 2016 9:34 am

I have to admit there is huge potential, and you've just opened my eyes !

Lazur
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Re: Metallic Foil Texture

Postby Lazur » Wed Mar 16, 2016 9:42 am

You are welcome!


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Espermaschine
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Re: Metallic Foil Texture

Postby Espermaschine » Thu Mar 17, 2016 1:26 pm

Lazur URH wrote:option.

Had a look at two videotutorials, Tav's manual and the fabric tutorial on Tav's blog.
I can do the Dropshadow mini-tutorial and i do get a few things because of similarities in Gimp (bumpmapping, displacement-map), but thats about it.

For example i dont get the concept of 'Background Image' and 'Source Graphic'. Is that a z-order thing ?
Why two different terms (image and graphic) ?
The manual says, the background image is the region under the filter...

Also, when i look at your goldtextures, there are several instances of 'Composite' and 'Color Matrix'.
It all seems so chaotic and im unclear on what to link with what and why.
When do i link to an effect, and which one, and when to the source image ???

Lazur
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Re: Metallic Foil Texture

Postby Lazur » Thu Mar 17, 2016 4:33 pm

In the attached svg "gold filtr recorded" there is only one colormatrix.

Values of the columns refer to rgba, the default

1000
0100
0010
0001 means you will see the original r value*1, original green value*1, original blue value*1, original alpha*1 from the filtered source area.

Multiplied those rgb values with 1,8, meaning the result will be lighter by 180%.
Other presets, like luminance to alpha -"create layer mask from layers greyscale copy"- or hue rotate are doing what they say exactly.

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Espermaschine
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Re: Metallic Foil Texture

Postby Espermaschine » Fri Mar 18, 2016 3:26 am

Thats not what i was asking.
I also linked to the gold foil texture pack, not the one you made in the recording.

Lazur
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Re: Metallic Foil Texture

Postby Lazur » Fri Mar 18, 2016 6:08 am

Espermaschine wrote:Had a look at two videotutorials, Tav's manual and the fabric tutorial on Tav's blog.


(mentioned tutorials:
Tav's 1st
Tav's 2nd)

I can do the Dropshadow mini-tutorial and i do get a few things because of similarities in Gimp (bumpmapping, displacement-map), but thats about it.

For example i dont get the concept of 'Background Image' and 'Source Graphic'. Is that a z-order thing ?
Why two different terms (image and graphic) ?
The manual says, the background image is the region under the filter...


I always use the source graphic for the start as the others doesn't all work.
You can get to the source's alpha by a fecomposite from the source graphic, and sadly you cannot use individual filter primitives on the stroke and the fill, so that is a placeholder. At least that's what I heard from Suv at the live chat in the past.


Also, when i look at your goldtextures, there are several instances of 'Composite' and 'Color Matrix'.
It all seems so chaotic and im unclear on what to link with what and why.
When do i link to an effect, and which one, and when to the source image ???


As you may have seen in the video I'm not that experienced with it either as I often have to change the ordering of the inputs to that primitive.
The "in" option should use "A" source's alpha values and display the other "B" connected source only where "A" is opaque.
Knowing that, you can sort out and correct it if the result is not rendered as you intended.

Atop/Over also should be "self explanatory" although I'm not sure about the exact difference between them.
Maybe they are the same except for the source/connection ordering? Use them if you want to display one of the sources above the other. (As in z-ordering.)

The arithmetic option is also helpful time to time.
With that, you can "change the opacity of the source on top of the other one fully opaque below"
Can have multiply and similar effect yet that is how I use it mostly.
This image is showing it in action.


I use the colormatrix for lightening/darkening the source a bit and sometimes for hardclipping the alpha values of the source too.
That is by editing the last row, from
0; 0; 1; 0 to like 0; 0; 8; -3; 0. Needs try and error for fine tuning, as with most of the other filter primitives.


How to know "what you are doing" when editing a filter?
In general it is driving blindfolded as there is no preview of each of the primitives individually and the editor doesn't help much unconnecting and connecting in a different structure.

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Espermaschine
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Re: Metallic Foil Texture

Postby Espermaschine » Fri Mar 18, 2016 6:22 am

Thanks !

I can do Tav's fabric tutorial without a problem.
It all seems logical but applying it to something else is a problem.

Also i dont understand why you cant temporarily deactivate a filter component to see what happens when you take something out of the equation - all you can do is delete it.

Lazur URH wrote:How to know "what you are doing" when editing a filter?
In general it is driving blindfolded as there is no preview of each of the primitives individually and the editor doesn't help much unconnecting and connecting in a different structure.

Well at least you are getting somewhere. I'll keep trying.

Lazur
Posts: 4258
Joined: Tue Jun 14, 2016 10:38 am

Re: Metallic Foil Texture

Postby Lazur » Fri Mar 18, 2016 7:37 am

You can change the connection order although it's not less complicated usually.

And by the way, good luck with experimenting!


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