private void processRefl(String line) {
        String filename = null;

        int type = BuilderInterface.MTL_REFL_TYPE_UNKNOWN;
        line = line.substring(MTL_REFL.length()).trim();
        if (line.startsWith("-type")) {
            line = line.substring("-type".length()).trim();
            if (line.startsWith(MTL_REFL_TYPE_SPHERE)) {
                type = BuilderInterface.MTL_REFL_TYPE_SPHERE;
                filename = line.substring(MTL_REFL_TYPE_SPHERE.length()).trim();
            } else if (line.startsWith(MTL_REFL_TYPE_CUBE_TOP)) {
                type = BuilderInterface.MTL_REFL_TYPE_CUBE_TOP;
                filename = line.substring(MTL_REFL_TYPE_CUBE_TOP.length()).trim();
            } else if (line.startsWith(MTL_REFL_TYPE_CUBE_BOTTOM)) {
                type = BuilderInterface.MTL_REFL_TYPE_CUBE_BOTTOM;
                filename = line.substring(MTL_REFL_TYPE_CUBE_BOTTOM.length()).trim();
            } else if (line.startsWith(MTL_REFL_TYPE_CUBE_FRONT)) {
                type = BuilderInterface.MTL_REFL_TYPE_CUBE_FRONT;
                filename = line.substring(MTL_REFL_TYPE_CUBE_FRONT.length()).trim();
            } else if (line.startsWith(MTL_REFL_TYPE_CUBE_BACK)) {
                type = BuilderInterface.MTL_REFL_TYPE_CUBE_BACK;
                filename = line.substring(MTL_REFL_TYPE_CUBE_BACK.length()).trim();
            } else if (line.startsWith(MTL_REFL_TYPE_CUBE_LEFT)) {
                type = BuilderInterface.MTL_REFL_TYPE_CUBE_LEFT;
                filename = line.substring(MTL_REFL_TYPE_CUBE_LEFT.length()).trim();
            } else if (line.startsWith(MTL_REFL_TYPE_CUBE_RIGHT)) {
                type = BuilderInterface.MTL_REFL_TYPE_CUBE_RIGHT;
                filename = line.substring(MTL_REFL_TYPE_CUBE_RIGHT.length()).trim();
            } else {
                System.err.println("Parse.processRefl: ERROR! unknown material refl -type, line = |" + line + "|");
                return;
            }
        } else {
            filename = line;
        }

        builder.setRefl(type, filename);
    }