If you want to show the curly braces in an image generated via texttoimage make sure to not use the wash operator at the same time as it will cause all sorts of problems. For example this code will work:
{concat('{ ', $node_name, ' }')|texttoimage( 'nav_header' )}
This will not:
{concat('{ ', $node_name, ' }')|wash|texttoimage( 'nav_header' )}
nor will:
{concat('{literal}{{/literal} ', $node_name, ' {literal}}{/literal}')|wash|texttoimage( 'nav_header' )}
Tip: Using curly braces
Alex Jones
Tuesday 27 April 2004 8:54:42 pm
{concat('{ ', $node_name, ' }')|texttoimage( 'nav_header' )}
This will not:
{concat('{ ', $node_name, ' }')|wash|texttoimage( 'nav_header' )}
nor will:
{concat('{literal}{{/literal} ', $node_name, ' {literal}}{/literal}')|wash|texttoimage( 'nav_header' )}
Alex