Najara

Missing an underscore in the accname.lub.
Change:
    [ACCESSORY_IDs.ACCESSORY_darthmaulmask] = "darthmaulmask",
Into:
    [ACCESSORY_IDs.ACCESSORY_darthmaulmask] = "_darthmaulmask",
Also, what client are you using? If 2011+, there's no need editting the data/*nametable.txt files. ? 
P.s - Wrong section. Should be moved to Client-Side support.

Hi. Did you delete any components from your data.grf? Because these files should be present in the official/kRO client. 
I could send them to you but there might be a lot more missing. With that said, I'd recommend you to get a new kRO client with a fully updated data.grf. ? 

Hi. Double-check if the bit rate of the file is 24 bit. The client does not read any other rate.

Also known as cutins and renders, many of them already exists. You can find them in (r)data.grf under the following path:
data/texture/À¯ÀúÀÎÅÍÆäÀ̽º/illust
In order to incorporate them in a script, you'll need to add something like cutin "filename",position;
More information can be found here.
Good luck~

If you search through npcidentity.lub, you'll find that ID 2800 belongs to Horn's sprite. You should change your custom ID to something that does not yet exist. My own lub is rather outdated so I'm not able to give you an exact free/unused ID, but I'm *guessing* some should be free in the range of 3500. 
Once you've changed the ID, search for JT_MONSTER_LAST in the same file and increase it to a higher value (i.e 3600). After, adjust your mob_db to correspond with the new ID.
Your jobname.lub looks fine and if I'm not mistaken, jobidentity.lub need not even be edited. Good luck!

There are some maps that use the mini maps of other maps, like the WoE maps that you stated, in order to save space in the GRF.
Have you edited anything in the official data.grf? I'm asking because you might be missing the data/resnametable.txt file which is responsible for this feature.

Hi there. Maybe a silly question but are you sure you are trying to ride a dragon instead of a peco? Check the all in one NPC in order to confirm.
My (long ago) experience is that RKs can ride peco's but the sprite won't show, so maybe you're riding the wrong creature.

Hi Lai. That's the hourly reminder. You can diff it out of the client by checking 'Remove Hourly Announce (Recommended)' in NEMO.  

Hello,
Is it possible that you have tried re-naming the map by right clicking->rename? That unfortunately does not work for RO maps. The only way to change map names is to open them in a Ragnarok Online map editor (such as Brow Edit) and save them with a different name.
If you have no Brow Edit knowledge; you could attach (or pm me) your files so I can change it to your desired name.  

Is this the case with just this particular texture? If not, it might has to do with your resolution settings. Try to use different dimensions, for example (in your brow/data/configs/ro.xml):
        <resx>1280</resx>         <resy>720</resy>   I hope this will resolve your problem.

See my signature.

Coli2.rar
 
Also, as respond to Winz', it isn't possible to just re-name maps by clicking them, you will find yourself erroring in game, even if all the server-side changes are correctly made.

Hello there.
 
Have you tried this yet?
http://rathena.org/board/topic/79464-cant-choose-hair-colour-on-certian-hairstyles-on-character-creation/#entry183559

Have you properly given the sprites a 'collection' and 'item' image (texture folder)? If yes, your problem is pretty much the same as this, only this user's client defaults to the 'null' image:
http://rathena.org/board/topic/95145-headgear-view-and-name-change/
 
 
If doing my solution doesn't work for you, please refer back to your texture/À¯ÀúÀÎÅÍÆäÀ̽º/item and texture/À¯ÀúÀÎÅÍÆäÀ̽º/collection and see if your sprites are present. Good luck~

A few simple steps should hopefully be enough.
 
1) Download and configure Browedit - Syouji has explained how in that link.
2) Open the program and load the map you wish to re-name.
3) Click "Save as" and save it with a new name.
 
And that'd be all~

Are you using a 2012 client, or up?
 
In case of 2012; What you need to do is locate data/idnum2itemresnametable.txt, find the sprite name of the cap (2227#ĸ#) then copy and paste that sprite name (#ĸ#) behind your Dyna headgear ID. So, if your Dyna headgear ID is 30000, it should look like this: 30000#ĸ#
 
If you are using a newer client, please refer to your System/Iteminfo.lua
 
Hope this helps :3 

A way to do this is to open your client in a hex editor and search for: NC_CashShop (or string 4E 43 5F 43 61 73 68 53 68 6F 70)
 
Replace the values in the string with "00" for each line, so basically the number above^ will become:
00 00 00 00 00 00 00 00 00 00 00
 
Be sure to make a backup of your client in case something goes wrong.

Hey Kido~
Maybe not exactly an answer to the background expanding problem, but the content-out-of-the-containter issue can be solved fairly easily be doing the following: Open the page in a FTP client (I pressume it's the item page) and see to the top line: <?php if (!defined('FLUX_ROOT')) exit; ?>
 
add the following tag after:
<div style="height:600px;width:600px;border:0px solid #ccc;font:12px/12px Arial;overflow:auto;">
 
(You can close it with another </div> at the end of the code, but it's not really required.)
 
That will make the page scrollable within stated height. If 600 isn't the height you want, just increase or decrease it.

Here you go - taken from a 'outdated' .GRF.
 
Remember to patch the .gats in WeeMapCache for these to be applied!
 
Destruction of Morroc.rar

Try this (attachment) - remember to convert/rename to .lub.
 
I've left out the comma, as according to some users commas are not a requirement for the final entry of (custom) monsters.
I strongly advice you that, if the problem persists, to add a comma any way at the last entry on both files.
 
Please report back if that worked.
npcidentity.txt

Here you go~
 
dali.rar
 
 

You mean to avoid hard shadow?
 
For a proper shadow with a normal sunlight, create two (ambient) lights with the following setup: 
 
(You may play some with the colors, but keeping it at zero would do just fine as well)
Name: Sun Position: -1000, 10000, -1000 color: 0, 0, 0 Intensity: 100 Range: 200000 Max. Light Inc: 256 Light Falloff: 0 Cast Shadows: Empty Name: Ambiance Position: Doesn't really matter. Just place it somewhere in the middle of the map, and pull the lightbulb up for a good bit. Color: 0, 0, 0 Intensity: 156 Range: 200000 Max. Light Inc: 256 Light Falloff: 0 Cast Shadows: Checked

You need to update your rdata.grf, that, or manually find the card images and place them into: data/texture/유저인터페이스/cardbmp/
Make sure that, after finding the images, to add them properly in the text files as well. Here's how you can do it [link]
 
Hope this helps~

1) Open WeeMapCache.
2) Click "Open", and select your servers map_cache.dat (located in .../db/ or .../db/(pre-)re/ (depending on your emulator)
3) Maps have been loaded, now click the "File.." (with a green plus icon), and select the .gat file you want to patch (the one that came along with your custom prontera.)
4) Save and import the edited map_cache.dat back to the accurate directory in your server.
5) Restart your server and you'll see the tiles are walkable.
 
If after doing this the tiles still aren't walkable, it's possible that the author did not adjust the gats but merely the design of the map.

You could try websites like Turbosquid.com and Archive3D.net, otherwise just google with keywords like "lowpoly 3ds tree". Should do the trick.