[Gargoyle]

OMG! Ihave a beard I wear glasses! Am I Rolf Harris?

Do I have an Australian acccent? No.
Do I play the wobble-board? No.
Have I ever painted the Queen from life? Er....................No.


Thank the Flying Spaghetti Monster! I'm not Rolf Harris!

I say Carruthers that was a damn close run thing!

[Griatch]

@TheLastHotel

You cannot edit the existing brushes that come with GIMP (nor make them rescalable), instead you have to create new ones. That's what I can think of straigh off. Otherwise you have to be more specific about describing your problem.

@Gargoyle

Yes, there you go! Not bad! It's good training to play around with this. You have some good structure in the bark already. For the sake of giving critique; the trunk needs more "weight". That is, it looks a bit transparent in the main trunk. Try a few more strokes with a huge brush through the center to solidify the tree. It's just a sketch, don't worry about covering over details you did before, you shouldn't put so much effort into details at this point that you cannot scribble down things fast all the time. Nevertheless, if you don't want to change any more it could be worthwhile starting over again from scratch, to see if there is any difference in how you go about it the next time.

To think of: I would suggest playing with brush sizes more than you do. You can get away with much larger brushes than you'd think, especially for the trunk and roots. Try to then limit the size and make a few strokes along the sides of the trunk and you'll see it will suddenly look much sharper and "3D". Really small airbrush sizes will create surprisingly sharp lines for branches and twigs, especially useful for the white highlights -- these are best done with a small, sharp brush (still with the airbrush tool of course).
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Griatch

[Neil]

@Griatch

Thanks for the compliment on my tree, but no I never used any fill effects just a high opacity and I guess I just have a steady hand if my lines look like they wern't done with the air brush, sorry it took me a bit to answer oh and I'm gonna get the G5 mouse for Christmas or maybe a better one! :l:

[Griatch]

Quote

Thanks for the compliment on my tree, but no I never used any fill effects just a high opacity and I guess I just have a steady hand if my lines look like they wern't done with the air brush, sorry it took me a bit to answer oh and I'm gonna get the G5 mouse for Christmas or maybe a better one!

Ok, cool! Must be a steady hand indeed!

Maybe try it out again with the low opacity too then, just to test it? At high opacity the airbrush is similar to the paintbrush. It behaves very differently at low opacities.
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Griatch

[sir hobo]

wow thats cool

[Ali Imran]

Your skill is GOD gifted + your imagination is good.
The techniques you shared are very well detailed and will definitely help every reader.

I thank you for your consecutive contributions to GT, and I really appreciate the time and effort involved in compiling these writings alognwith illustrations.

regards

[rover789456]

That is truelly amazing... it proves once again that GIMP = PS or even better. ^_^

I'm sketching my tree atm, i'l post my result when i'm done. ;)

EDIT: I did it with my mouse. ;O



Griatch, question do you scan sketches and then use them (for your other drawings on DA) ? Or do you directly sketch on the computer with your drawing-tablet.

[Griatch]

That's a good tree, rover! Also a nice "glow" effect behind the tree trunk, a good use of the airbrush and makes for a cool effect.

As for my own sketches -- no, I don't scan. I draw everything directly on the computer.

I put up everyone's current results in the first post. :h:
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Griatch

[redwagon2020]

This is what i got, what do you guys think?

[Ti-Louis]

Mine is an unrooted (does this word exist?) tree :-)


I hate the roots, but I made it in less than 10 minutes...

[Griatch]

@redwagon2020

I think it looks good! I like how you have let the background blend through in strategic places, letting it create the ambient light on the trunk. Looks like you have some good brush-stroke techniques there too. Would be nice with a bigger picture though, it's a bit hard to make out the details.
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[Griatch]

@Ti-Louis

Nice and thanks for trying out the tutorial! The exercise is about making a loose, quick sketch, and this you have done. Never mind the clunky roots system, realism is not the point here. Working fast can often create the best effects, and you have a really desolate and haunted feeling to this picture. Quite suggestive it is, and as a sketch there's a lot of potential here. I would even have stayed away from the few details you have put in there - just suggest the roots, rather than try to make them clearer with a smaller brush; the suggestive feeling here is worth holding on to. :)
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Griatch

[PhotoComix]

i get few problem to create new dinamic key.
Is not clear is it gimp or my OS but the concept of "simultaneus" is applied in a too strictly way

I mean if i want use a key as "rd" 9 times on 10 it will not work...i will get instead the result for "r" or "d"i suppose becouse one of the 2 is pressed some microscopic fractions of secod later .

Do you know if there is a way to give more tollerance to "togheter" in "press togheter"?...it seems as only "single letter" key could be used

This not only for using , but also to assign new one (if i try "RD" a message will pop up telling " the R key is already used..."

Is weird that i get not this problem when i use the usual combinations (i mean ctrl+c, ctrl+z) commun to most of programs

[Griatch]

@fotocomics

It's not a problem with GIMP, but with the keyboard protocol used in all modern computer keyboards. The key presses are recorded internally in the keyboard's input buffer (even before sending it to the computer processor) in different ways depending on what type of key you press. The "qualifier keys" (ctrl, alt,Shift, alt gr,Shift lock) are special cases -- if you press them, they remember their state, (pressed down or not pressed down) -- and holding them down will not result in any more "shift presses". On the other hand, those keys don't produce any output either. This is why they are "qualifier keys" after all.

The "normal" keys, like the alphanumerical keys (a,b,1,2,3... ) and others (tab,space,home,F5 Insert ...) on the other hand don't record the "lift up" event, it just checks "was I pressed down?" several times every second. This means that if you hold down one of these keys the keyboard hardware will not realize you held the key down, but will just check if it was pressed at all, redoing that check over and and over. It does not care if you lifted your finger in between or not. This is why holding down 'f' will produce "fffffffffffffffffffff ".....

The keypresses are read off fast enough to never have simultaneous presses (if there is, I imagine it just picks one of them to be first) and they are put in the keyboard buffer's queue, so that the keyboard hardware can send it off one at a time when the OS asks for the info. The current qualifyer key states are also sent along, for the OS to use in whatever way it wants.

For this reason, you can never combine two alphanumerical keys together in a keyboard shortcut -- per definition there is simply no way for them to be pressed down "at the same time". If you can manage to get results with a shortcut like that you're just plain lucky in happening to hit that millisecond where the hardware polls and the software is emptying the buffer -- that is a OS glitch, I'd say. You can never expect that to be a reliable shortcut though.

This is why all two-key shortcuts are always a combination of qualifyer key+normal key, like Ctrl+K etc.
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Griatch

[PhotoComix]

Thank you
i avoided to use "qualifier keys" becouse most of combination seems as already assigned
so instead then change brush size they will take screenshoot , open task manager or something alike

But i see that i have to figure out how to use them avoiding confict...

i'm wondering if there is a way to have a list of all the "free" shortcut availble i mean the ones that
are not already assigned by default to do something else (...or a list of all the already used shortcut).

[redwagon2020]

Griatch that was a great tutorial. Do you have any more airbrushing tutorials? Or links to some?
Thx man

[Griatch]

@fotocomics

I usually don't worry that much about reassigning existing keys -- because if I don't know the shortcut is taken I'm probably not using it much anyhow. The dynamic shortcut allocation of GIMP (select it in the menu and press the key you want it to have ) is excellent and one of GTK's strongest sides. I sometimes assign a keyboard shortcut just temporarily when I know I'll be using a function more than usual.

I think that Shift+keys are rather rarely used in the default setup, as are Ctrl+Shift+key (3-finger) combinations. Ctrl+Alt+s I have for "stroke selection" for example.

Have no idea about Windows, but in Linux all the shortcuts bound in the menues at least can be found in ~/.gimp-2.2/menurc .


@redwagon2020

Thanks! I'm glad you liked it enough to try it out -- and with such a good result too. :-)

I'm sure there are a lot of airbrushing tutorials out there, but I can't for the life of me recall ever reading one. If there is demand I could eventually make another one on the same subject. If you want things to try, you can look at some of my other tutorials though; I use airbrush almost exclusively in them and people have followed them with very promising results.
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Griatch

[PhotoComix]

Thank this helped

i really use only 6 shortcut (copy paste delete and 3 for screen-grab )so i can reassign all the others with no worry,

[Gus]

My brush editor dosen't work for some reason, any ideas?

[Griatch]

@Gus

You cannot edit the default brushes, only ones you create yourself. That's the most common problem people seem to have at least. What is it that does not work?
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Griatch