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From the developer:
NVIDIA Plug-ins for Adobe Photoshop
This installer contains two plug-ins and several helpful scripts for Adobe®
Photoshop®.
These tools operate within Photoshop itself. If you are looking for
texture compression libraries, or command-line texture compression and
generation, please take a look at our new GPU-Accelerated Texture Tools, which
provide a 10x performance boost if you have a GeForce 8 Series
GPU. 
The Plug-Ins
- DDS-Import/Export
- The NVIDIA DDS plug-in supports the DXTC texture compression format and allows
you to open and save .dds files in RGB format. It reads and writes .dds
files in compressed or uncompressed forms, provides support for per-MIP color fading,
MIP-corrected normal mapping, and more.
The NVIDIA Normal Map filter creates normal maps from grayscale height maps.
The filter UI provides a powerful 3D preview and a variety of filtering options.
For MIP-mapped normal maps, the NormalMap Filter should be used for preview only,
and then the grayscale map exported via the DDS plugin with "Normal Map Settings..."
enabled. This will create a normal map with maximal detail and fidelity for all texture
levels, without undesirable filter aliasing.
The Scripts
- Mipster
- Mipster is a mip-map generation script, for Photoshop CS2 and above,
that leverages the power of Photoshop’s internal image filtering engine
along with the (optional) NVIDIA DDS Plug-in and Normal Map Filter (for
Windows). While Mipster will function without either of these NVIDIA
plug-ins (e.g., on Macintosh), it works best in tandem with them.
Running Mipster on any image will create a collection of mip-map layers
in your current Photoshop document -- one layer per MIP.
- Cube Map Shuffler
- This script rearranges cube-map-face elements for use with different
export and editing tools. It can quickly convert and copy between
different cubemap layout formats, a task that has previously been
annoyingly slow and error-prone. If you are used to editing cube map
faces, you’ll find this script makes format changes a lot easier.
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