What do you think about these guidelines for pictures? (took them from Feed The Beast Wiki)
- Try to limit the file size of images you upload, smaller files reduce the load time of pages. You can use a tool such as PngOptimizer to perform a lossless compression of PNG files, which removes trivial metadata from the files without losing any image quality. Similar tools are also available for other formats. Make sure you use lossless compression, lossy compression will affect the image quality.
- All screenshots added to articles must be made using the Default Textures (no texture pack enabled) to avoid confusion.
- Screenshots should be taken under good lighting (e.g. during daytime, torches), unless it is to demonstrate a certain lighting effect.
- Screenshots should never show the user interface, unless it is to demonstrate a point. The user interface can be hidden using the F1 key.
- Screenshots should never show the player in third-person ("F5 mode"), unless it is to demonstrate a point.
- Screenshots should be cropped to not show any unrelated builds or constructions.
- Crafting grid icons should be 32px × 32px item slot pictures with transparent background. Files should be in PNG format and named File: Grid_<ITEMNAME>.png. (For example: Grid_Redstone.png)
Should we follow them too? I think they could help.
Also, if you have NEI installed, you could get the Grid images by clicking a button in the left-bottom corner of the inventory called Options. But before that, you need to have some kind of items in the NEI panel. After doing that, clicking Options, then clicking Tools, and then Data Dumps will give a GUI that allows dumping all kind of stuff into your .../.minecraft/dumps folder. What we want is that Item Panel section. Scroll through the options by clicking the first button in the Item Panel row. Click it until you get PNG. After that, choose the size of the PNG. For Crafting template we need 32x32. Now click Dump. Now you should see some files in your .../.minecraft/dumps/itempanel_icons folder.