Texture space and Temporary Memory usage can be reduced in the following ways.

• One Large Image with size xN by yN. Where N is the top compression amount. Then make render use x*(N-A) by y*(N-A) to render. This way remove all the smaller textures as larger texture includes them (only works up to max texture size set in config).
• During initialization memorize previous steps and copy forward (or go in reverse).