public void setPixel(int x, int y, int face, int mipLevel, ColorRGBA color) {
        if (mipMapRaster == null) {
            throw new IllegalArgumentException("This cube map has no mip maps");
        }

        mipMapRaster.setSlice(face);
        mipMapRaster.setMipLevel(mipLevel);
        mipMapRaster.setPixel(x, y, color);
    }
Writes a pixel given the 2-D coordinates, the mip level and the color
@param x the x tex coord (from 0 to width)
@param y the y tex coord (from 0 to height)
@param face the face to write to
@param mipLevel the mip level to write to
@param color the color to write
jme3-core/src/main/java/com/jme3/environment/util/CubeMapWrapper.java