There is an updated pull request by yopito against master on the void-packages repository

https://github.com/yopito/void-packages WIP.simage.18
https://github.com/void-linux/void-packages/pull/27805

[WIP] simage: update to pre 1.8.1
do not merge: testing before release
(help upstream, see https://github.com/coin3d/simage/issues/30)

A patch file from https://github.com/void-linux/void-packages/pull/27805.patch is attached