tax query
$tax_query = array(
array(
'taxonomy' => 'All Object Topics',
'terms' => 'Object Topic',
'field' => 'term_id',
'operator' => 'IN',
'include_children' => true,
),
array(
'taxonomy' => 'All Object Render Modes',
'terms' => 'Object Source',
'field' => 'term_id',
'operator' => 'IN',
'include_children' => true,
),
array(
'taxonomy' => 'All Object Dev Cycles',
'terms' => 'Dev Cycle',
'field' => 'term_id',
'operator' => 'IN',
'include_children' => true,
),
array(
'taxonomy' => 'All Object Sources',
'terms' => 'Object Source',
'field' => 'term_id',
'operator' => 'IN',
'include_children' => true,
),
);