Embodiments of the present disclosure relate to a method and arrangement for texture compression. An image block is divided into two half-blocks which are either living, also referred to as flipped configuration, or standing, also referred to as the non-flipped configuration. An estimate is generated for whether the flipped or the non-flipped configuration provides the best result for compressing a block. Compression is only executed for the configuration that is estimated to give the best result for the block.