write your own TCompressedImage that extends TImage and especially TD3D7CompressedImageFrame that extends TD3D7ImageFrame with its own draw method and use DrawImage with that one.
See Indiepaths Render2Texture Module as an idea which creates its own textures as well as stock Max2D textures can not be used as render targets
See Indiepaths Render2Texture Module as an idea which creates its own textures as well as stock Max2D textures can not be used as render targets