It is not mandatory to post in the CustomFigureWars showcase. The following is just for general knowledge. If you decide to post in the Showcase and the forum, please make sure to copy and paste the URL address of your forum post in your CFW showcase post. This way, both the showcase and forum, will both be linked for easy access. Again, one or the other is not mandatory, it's just for easy access to your work. Enjoy.
Step 1:

A: Locate the Post content link, on the left column of the site as shown above, and click on it.
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Step 2:

A: Then press the Upload a Custom link.
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** Fan Art, Blogs, Black Market ads, Recipes & Tutorials can also be added through the post content icon. **
For a more in depth users guide follow this link.