public ColorRGBA getPixel(int x, int y, int face, int mipLevel, ColorRGBA store) {
        if (mipMapRaster == null) {
            throw new IllegalArgumentException("This cube map has no mip maps");
        }
        if (store == null) {
            store = new ColorRGBA();
        }
        mipMapRaster.setSlice(face);
        mipMapRaster.setMipLevel(mipLevel);
        return mipMapRaster.getPixel(x, y, store);
    }
Reads a pixel from the cube map given the 2D coordinates and the face and 
the mip level to read from
@param x the x tex coordinate (from 0 to width)
@param y the y tex coordinate (from 0 to height)
@param face the face to read from
@param mipLevel the miplevel to read from
@param store the color where the result is stored.
@return the color read.
jme3-core/src/main/java/com/jme3/environment/util/CubeMapWrapper.java