Help With PNG Weapons

[Neccronixis]

Hello all. Im new to this thread so I apologise if I have entered anything in the wrong category or thread. Im currently working on my weapons mod, Demonic Minds. I've got all my sprites drawn up, but I really do not understand the whole concept of using PNG graphics in gzdoom. Im using GIMP and Irfanview and I save my sprites as PNG's, but when I load the raw data into xwe, the colours do not change ( I have seen the colours distorted in many other weapons mods that use PNG's). I also do not understand why when I import PNGS into xwe, the offset is incorrect and different to a sprite, why when I click on a PNG and drag, the box appears at an entirely different location, not around the graphic.
I'll see if I can get any images uploaded of the weapons...

Any help and recommendations for programs or tutorials would be greatly appreciated (I am new to weapon modding using DECORATE)

[Gez]

Do not use XWE? Look on the SVN part of the site, you'll find builds of SLADE3.

[Neccronixis]

Slade3 fixes the offset problem, but the transparent colour is still present on the PNG graphic. When I open another wad like le-guns 4, the weapons don't have any colour present. Is this a problem with setting my transparent colour?

[Gez]

There are no transparent colors. This is a lie.

However, if you use Slade's image conversion function (you can perfectly well convert from PNG to PNG...), you can make a color become transparent. IrfanView has such a function as well, however Slade will not erase the offset chunk. See [zwiki]PNG[/zwiki] for further information.

[Neccronixis]

When I use my PNG weapons in-game, do I need a specific palette in the wad file to enable the colours?

[Neccronixis]

And how do I set the transparency colour in Irfanview and SLADE3 so it doesnt appear in SLDAE3?

[Gez]

In Slade:
-right-click on the lump
-select "Convert GFX"
-select to keep it a PNG, but look in the transparency options

[Neccronixis]

I tried that and it didnt work, the colour still shows up on the PNG, and why do I keep getting this 'Not impemented' error everytime I try to perform an action on SLADE3?

[Gez]

Not every time. Several features are not implemented yet because it's still ongoing development. Anyway, the one feature I was talking about here works fine in all my tests.