Scenefixer -- about 4,000 times for each scene I complete. (WIth SR4, the gamma on image maps changes every time I duplicate an object, so.... couldn't live without this miracle of a script).

Edit: Poser Primitives. Can't believe I forgot these.

EZSkin2 -- every single living thing that will show up in a close up gets put through this, and all humans, whether background or main.

The skydome from Faveral's Viking Village. It's so pretty, I just made it part of my default scene.

One of BB's IBLs, distributed with VSS about 200 years ago.

The terrain from FirstBastion's Farm Fencing.

A flat plane using one of BB's water shaders.

Stone Texture Building Kit by Laurie S -- a Plat Club texture maps release that I use in half my architectural scenes.

Genesis, Genesis 2, V4, M4 -- and the DSON loader script by D3D.

No Limits script by Cliff Bowman.

Loretta and Lorenzo LoRez (and/or other lorez figs by Predatron).

Master Skullcap by 3Dream (for very low poly hair).

Dynamic clothing by Esha, Tipol, Kaleya, Cute3D (and several others).

Various houses and/or other cool props by Dark Anvil.

Oh, and I almost forgot -- one or several of the construction kits by Mapps, one or more of the Scenescapes sets by MortemVetus, or Room Creator 2 by Maclean. Truly useful, I find. Something made by each of them makes into every scene I make nowadays.

At least one prop by Danie and Marforno. Usually a lantern. Frequently, a vase, plant, wall, or piece of furniture, or a pose.

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PoserPro 2014, PS CS5.5 Ext, Nikon D300. Win 8, i7-4770 @ 3.4 GHz, AMD Radeon 8570, 12 GB RAM.