After a lifetime of capturing Tasmanian landscapes and winning international recognition for her miniature works, artist Joan Humble is holding her final exhibition.The 88-year-old has a terminal cancer diagnosis.But she is determined to keep painting as long as she can still hold a brush."I want to make the most of the rest of my time I've got five commissions to do, so I've got to keep going," Humble said.She says painting is keeping her alive."You can't think about your body at all when you're painting, you've got to concentrate on what colour you've got on your brush," she said.Humble is known for her works in miniature, capturing vast vistas of wilderness in tiny works of art."When you are looking at a miniature, you're looking at the whole subject, so everything has to work," she said."Your eyes are not travelling around the painting; you can see exactly what's in front of you, so it's got to be right."In 2014, Humble won the Golden Bowl, the highest international prize for miniature artwork.Like many of her artworks, the winning painting was of a scene from Tasmania's South West Wilderness.She has visited the remote location 16 times and plans to take one more trip."I paint what I love