editing transparency

[Torvin]

let's say i've somehow changed the transparency of some pixels on a layer (e.g. by using an eraser or applying a mask) and now these pixels, let's say, 50% transparent.
now, how do i make them, let's say, 20% transparent (80% opaque)? with tools like masks or eraser i can only make them more transparent, but i need less...

UPD: see solution on the page 3: http://www.photoshopgurus.com/forum/photoshop-newbies/21743-editing-transparency-3.html#post107930

 

[Nomission]

If you paint black in the layer mask, you get opacity 0%, with white, opacity 100%.
Any grey level between, gives the correspondent amount of transparency.
Hope it helped...

 

[Torvin]

yes, i know that. but what should i do if mask's been already applied and deleted?

 

[Nomission]

And why would you do that?

 

[Torvin]

that doesn't matter. consider i changed the transparency of pixels using eraser, not mask

 

[Nomission]

Ok, eraser set pixel information. If you use it at 100% opacity it simply clears those affected pixels and once gone...they're gone.(that's why we use masks, because they are "summed" with the actual pixels)
This also aplies to any "degree" of erasing...

 

[Torvin]

Ok, eraser set pixel information.

it does. and that's what i am asking!
how to CHANGE the pixel information?
it would be great if i could edit transparency as a separate channel (don't offer me to create it. i ALREADY have semi-transparent image - now i want to edit it!)

 

[Nomission]

I use a trick I developed myself, to get opacity back.
In a presence of a semi-transparent image (with no alpha channel available), I paste it repeatdly over itself. Eventually the sum of the semi-transparent pixels will turn them opaque.
Don't expect great results on drop shadows and the like, because it will destroy them.

 

[rangaraj1987]

Often of the times (all of the times at my knowledge) the texture is in the courts .fsh files. You could try to edit the pwod-file (I think it's that file that you have in you picture there) in the courts xxxcrt_vra.fsh-file to transparent.
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[Torvin]

I use a trick I developed myself, to get opacity back.

well, i use the same here i was hoping to find something more useful. but thanks anyway..
looks like photoshop does not allow editing transparency channel... that seems strange to me, because more simple (and free) graphic editors often have this feature..

@rangaraj1987: i have no idea what are you talking about

 

[sbdb]

You know what your problem is? You got yourself an illegal copy of Photoshop, you have no clue how it works, because you refuse to finish any book or course, then you try to make Photoshop work like any previous image editor, you refuse to listen to all comments or suggestions and then you claim that Photoshop (the #1 image editor by far) can't do what others can.... you're funny

Edit:

@rangaraj1987: i have no idea what are you talking about

Uh....cough, cough,....rangaraj1987 is a spambot... no wonder why he doesn't make any sense...doh!

 

[Torvin]

You know what your problem is? You got yourself an illegal copy of Photoshop, you have no clue how it works, because you refuse to finish any book or course, then you try to make Photoshop work like any previous image editor, you refuse to listen to all comments or suggestions and then you claim that Photoshop (the #1 image editor by far) can't do what others can.... you're funny

oh, c'mon. i'm working with photoshop since version 3
where am i refuse to listen? that Nomission guy (the only one who tried to help me) uses the same trick that i do. and you haven't offered anything useful. i'm wondering if you bothered to read my question at all

Uh....cough, cough,....rangaraj1987 is a spambot... no wonder why he doesn't make any sense...doh!

oh... lol!

 

[sbdb]

oh, c'mon. i'm working with photoshop since version 3

Sure... I guess that's why you’re still asking basic questions in newbie forums 15 years and 8 Photoshop releases later...

wondering if you bothered to read my question at all

I did read your question.

you haven't offered anything useful

That’s because you don’t want to learn how Photoshop works, you just want it to imitate other software and by doing that you will never learn the Adobe way (and my way).

 

[Torvin]

Sure... I guess that's why you’re still asking basic questions in newbie forums 15 years and 8 Photoshop releases later...

i don't really care whether you believe or not

That’s because you don’t want to learn how Photoshop works, you just want it to imitate other software and by doing that you will never learn the Adobe way (and my way).

ok, see your ultimate urge to offend me. but you wont succeed in that

instead i'll repeat my question personally for you:
let's say i have a png, and all pixels of it is 50% transparent. i haven't created it. i downloaded it from the internet. now i want that pixels become 25% transparent (75% opaque). how would you, dear sbdb, a guru of photoshop, do that?

 

[rangaraj1987]

I don't know. I'm glad that everything runs really fine now and I'm afraid that things may break when I play around. I don't want to reinstall the whole thing because I can't figure out why Compiz won't work again (I remember those experiments with Compiz last summer, very exciting but a pain because I had to reinstall everything a couple of times).

 

[Rzlq]

ok, see your ultimate urge to offend me. but you wont succeed in that

instead i'll repeat my question personally for you:
let's say i have a png, and all pixels of it is 50% transparent. i haven't created it. i downloaded it from the internet. now i want that pixels become 25% transparent (75% opaque). how would you, dear sbdb, a guru of photoshop, do that?

right. i just googled through to here, with this discussion being the only page adressing my issue (same as Torvin's, though I'd actually prefer to be able to select those semi-transparent pictures and then do whatever i want with them).

considering that, i rather doubt this is a noob issue and has anything to do with stolen PS or what other nonsense this SBDB dork had to offer as a reply.

 

[Torvin]

thanks, Rzlq! maybe someday i'll write a small plugin that will convert a semi-transparent layer to a opaque one with a mask. but i'm too busy right now
btw, what do you mean by 'selecting' it? if you need to select layer pixels, you might just ctrl-click the layer in the layer palette. or I didn't get your question?

 

[Rzlq]

hey, that'd be cool ;]

as for your question, i'd like to be able to select just the semi-transparent pixels, without the opaque ones. maybe even say like "select pixels with transparency<75" (and subsequently perhaps a simple way to change that transparency).

 

[Torvin]

ah, i see. you then should switch to the quick mask mode and select pixels you need using 'select by color' command

 

[Torvin]

ah, stupid me. that won't work. that only works for selection, not for transparent pixels. you're right. you need the same feature i'm looking for