I've painted this recently for myself - it shows my Brachypelma auratum "Nugget".

I know that tarantulas don't spin orb-webs, so this painting is not scientifically correct, it's just artistic freedom. I think the orb-web fits the shape of the canvas really well. I could have drawn a random orb-web spider on it, but I just wanted to draw one of my pet tarantulas on it to establish an emotional connection to this picture.

I've added some small three-dimensional objects to the web (thanks to Schiraki for contributing the key, because i did not have one that was small enough to fit in there) and made the silks shiny using a special nacre acrylic colour. The highlights in the background are made by spreading salt on the wet colour. But it's better to use wood chips for this, since the salt can alter the colours through a chemical reaction!

The canvas measures approximately 30 cm from the furthermost corners.