Enviromap V1.4 script assists in the rendering of environment maps suitable for use with GIMP's Lighting Effect plug-in. It is based on the article described here. The script uses a random seed, along with multiple user defined parameters, to generate endless variations of several types of environment maps.
EnviroLogo V1.1 allows you to quickly create logos using Environment Mapping. If you select custom Environment Map, this script will load and use it. Otherwise, it contains the same functionality as the EnviroMap script for generating Environment Maps.
GIMP 2.8 Python Plugin.
This plugin allows you to place a layer in the rectangular selected area. The selected area can be of arbitrary rectangular shape.
1. Extract "place-layer-into-selection.py" from .zip archive to the ".../.gimp-2.x/plug-ins/" directory.
2. Make sure that the extracted file is executable.
3. If you are already running GIMP, close and reopen it.
Revisiting the concept of creating and using Luminosity Masks in GIMP. This script-fu will generate a full set of Light, Dark, and Midtone masks as channels for your image (based on the work of Tony Kuyper originally).