"I'm very happy about that.
"It's taken 40 years to recognise me as the artist and director and designer. I thought this day would never come and from my family they say it's never too late, so I work in full co-operation with the Destination Great Lake Taupo and the [tourist] operators. We have a very good collaboration and it's for a brighter future."
However Mr Brightwell's concerned about damage to the sculptures - he's distressed by what appear to be bullet marks above Ngatoroirangi's forehead - and he is looking for money to give the carvings, especially the smaller ones, "a major makeover".
He's also planning to return this summer to open Ngatoroirangi's eyes. When Mr Brightwell created Ngatoroirangi, he was so upset by the negativity that he left the sculpture's eyes blank.
"I didn't open his eyes because I didn't want him to see what was going on ... but I'll do it now."
He's hoping to get funding to do the makeover this summer and once it's done, he'll finish the left pupil on Ngatoroirangi-Iti, which he has purposely left unfinished until the larger sculpture is complete.
Destination Great Lake Taupo general manager Damian Coutts said the organisation worked with Mr Brightwell to produce videos and brochures telling the correct story of the carving for tourist operators to use, and Mr Brightwell also ran a wananga (workshop) for the operators to train them in more depth.
A koha box had been placed at the Taupo i-Site and many of the boat operators would also be installing them to collect donations for the carvings' restoration, he said.
The carvings provide a unique and meaningful visitor experience, he added.
"The thing I think is amazing about it is that it's such a beautiful part of the lake. You get a chance to experience the lake from the water rather than the land and you get this amazing cultural story behind it."