create_distortion_mesh(right_mesh, hmd, ovrEye_Right, right_fov);
ovrSizei tex_size = ovrHmd_GetFovTextureSize(hmd, ovrEye_Left, left_fov, 1.0);
create_distortion_mesh(right_mesh, hmd, ovrEye_Right, right_fov);
ovrSizei tex_size = ovrHmd_GetFovTextureSize(hmd, ovrEye_Left, left_fov, 1.0);