Painting Process- The Pit Fight

Sharing some of my process here while cleaning up HDD.
Below is a piece done for Midnight- Crown of Shadow
AD: Antonio Mainez
© 2022 Edge Studio. Midnight. All rights reserved

fantasy illustration, dwarf fighting, giant spider

For this piece I was asked to paint an underground fighting pit of a dwarf squaring off with a giant spider, with spectators surrounding it. I received a great amount of references, thanks to Antonio!
But a few ideas came to mind- Luke vs Rancor from Star Wars, image below. The set up feels similar and I remember vividly how terrifying it was to see it when I was just a kid.

Luke Vs Rancor

I tried to understand the space first before making a composition.

Did a rough sketch to confirm with Antonio if this is alright.

Then I proceed to sketch the composition. * Click the arrows back and forth if you’re keen to see progress differences*