In the Menu in the Top Right and Above you can find All my Texturepacks sorted into 4 Different Categories.
You can Click the Pack Thumbnails to Access the Preview Window.
Where you can use Left and Right Arrows to navigate or on each side of the Preview and "Esc" or hit the X to Close it.

Content Themes:
(SFW) Safe for Work: Suitable for Users of any Age.
(PG) "Barbie Nudity": Contains Soft Nudity; no Naughty Bits.
(LEWD) Lewd: Some Sexual Themes, like Big Boobs and Skimpier Outfits.

Player Sprite Styles:
(Slim) Slim and Petite.
(Curvy) Female Player Sprite have a Bigger Butt.
(Big Boobs) Female Player Sprite have a Bigger Butt and Big Bouncy Boobs.

Add-ons:
Packs with a (+) on it's Icon are Add-ons
Which Means the Required Texturepack needs to be Below it in the Texturepack Load Order.
Player Sprite Add-on only work for Specefic Player Sprite Styles:
(Standard) Only works for the Original Terraria Player Sprite.
(Slim) Only works with the Corresponding (Slim) Player Sprite.
(Curvy) Works with both of the Corresponding (Curvy) Player Sprite.
(Big Boobs) Works with both of the Corresponding (Big Boobs) Player Sprite.

Steam-Workshop:
Packs with This Icon next to the [Download] Button, are also Avalible on the Steam-Workshop.
And by Clicking It, the Workshop Page will open in a New Tab.