Subscribe to download
Super Map Icon Maker

This addon allows you to press a single button to take a screenshot. Then you can decide whether to keep it or take a new one. If you decide to keep it, it's saved in your gmod folder and named after the map you're currently on which makes the screenshot suitable for adding to a map icon pack. The next map from the maplist is loaded automatically and yet again you can take a screenshot in a single key stroke.

This is a very fast and convenient way for making map icons.

Chat Command: !SMM

+ Graphical User Interface for easy use
+ generate a list of maps that don't yet have a thumbnail (receives the maplist from server)
+ automatically cycle through each map
+ activate screenshot mode for having all important functions available in a single key press
+ download map icons directly from the map's workshop page (only for workshop titles that match the mapname)

Open the !smm menu and switch to the 'Upload' tab. Select the icons you wanna upload and you're done. Your submitted icon will be reviewed by me and either approved or rejected. Note that your steamID will also be transmitted.
The 'Upload' Tab doesn't show all your map icons but only the ones that aren't available on the database yet. Also you can only send images that are smaller than 64kb.

Your screenshots are saved in your /data/super_mapicon_maker/*x*/ folder on default. In order to send them to the server you can either use an external FTP Client or my FTP Client addon:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3476105169

Copy your made screenshots into garrysmod/maps folder and restart your game. Your main menu should have a map thumbnail for all maps now.
______________________________________________________________
You can open up the Map Icon Maker Menu using the chat command !smm or console command smm_menu.

The Maplist is used for generating a kind of 'playlist' of maps that don't have a map icon. You'll automatically cycle through all of them to take a screenshot. You can change the order of those maps by clicking on them and using 'Move Up' and 'Move Down'. You can remove the selected maps by clicking on 'Remove'.
There's two options for generating a maplist. The first, regular one is the 'Generate' button. This generates a maplist based on the maps that are installed on the server which don't have a map icon on your client.
The second option is 'Generate maplist from most requested map icons for PerfectMapvote' which requests the top 50 most requested maps for the Perfect MapVote addon which don't have a map icon yet. It also tries to find the corresponding workshop objects and downloads them automatically. However, this doesn't work for most maps as their workshop name doesn't entirely match the map's name. In that case you'll have to edit the maplist manually or click on a line (which copies the mapname to your clipboard) and search it up on the workshop yourself. A red text color tells you which maps aren't installed on your client.
When using 'Generate' or modifying the maplist you need to save it by clicking on 'Save'. It will create a file for your maplist so that it persists through your game sessions. You can switch to singleplayer to start taking screenshots now.
Using 'Load Map' you can jump to a map in your maplist immediately.

This tab contains all your installed maps. You can see right away which maps have map icons and which don't. By rightclicking on a map you'll see all available map icons and where in your files they're located.
There's a search bar and the option to select/deselect maps. The 'Add to Maplist' button adds marked maps to your maplist. The 'Download all Thumbnails from Workshop' button tries to download the workshop object's preview image to use that as the map icon. This doesn't work for most maps as the workshop name usually doesn't entirely match the map name.

The 'Screenshot Mode' enables the quick way for taking screenshots. In the top right it tells you the hotkeys for toggling the !smm menu (default: E), taking a screenshot (default R) and disabling the Screenshot Mode (default Tab).
In the top left you can see the screenshot you're about to take and it's size in pixels. Note that good map icons should be quite small (recommended: 312x312) so that also their file size is small.
You can adjust the screenshot size using the 'Screenshot Size' slider.
There are default paths where the Mapicon Maker looks for map icons. Usually there's no need to modify them. Should you wish to add or remove paths you can do that in the 'Search Locations of Map Thumbnails for this menu' section.

The Upload Tab corresponds to the Perfect Mapvote addon. This tab compares your map with the map icons that are available in the central database. You can upload your own map icons to it by marking them and clicking on 'Upload'. Note that your steamID will be transmitted to prevent abusing this feature for spreading NSFW images.
Only those map icons that are smaller than 64kb can be uploaded. It can take up to 24 hours before the central database approves (or rejects) your submission. Should a map icon be too big you can mark it and click on 'Add to Maplist' to take a more suitable screenshot.

This work is licensed under CC BY-NC-ND 4.0 [creativecommons.org]