RayHandler change

void renderWithShaders() {

        if (shadows || blur) {
            lightMap.frameBuffer.begin();
            Gdx.gl20.glClearColor(0f, 0f, 0f, 0f);
            Gdx.gl20.glClear(GL20.GL_COLOR_BUFFER_BIT);
        }

        lightShader.setUniformi("u_mask", 8);

        Gdx.gl.glActiveTexture(GL10.GL_TEXTURE8);
        mask.bind();
        Gdx.gl.glActiveTexture(GL10.GL_TEXTURE0);

        lightShader.begin();
        {
            lightShader.setUniformMatrix("u_projTrans", combined);

            final Light[] list = lightList.items;
            for (int i = 0, size = lightList.size; i < size; i++) {
                list[i].render();
            }
        }
        lightShader.end();

        if (shadows || blur) {
            lightMap.frameBuffer.end();
            lightMap.render();
        }

    }