Image interpolation 800x600 -> 2000x2700 + printing?

Question

Seal

Will there be graininess (other defects) if printed in 60x90 cm printing?
Thanks in advance.
PS just in case image link - impressonme.com/2010/07/someone-broke-the-swing

Answer 1

baa... that's how you go.
I drew this picture.
Here is the hirez.
reey.ru/hires/someone_broke_the_swing.tif

Answer 2

resize is not needed - if the picture is viewed from a distance of 1-2 meters - it will be fine.
if you want it to be great, do a color proof, look at the flaws and work them out

Answer 3

Thanks:)

Answer 4

I somehow read in New masters of Photoshop that to print a small raster over a large area, you can also use image vectorization.