Playing with the water transparency revealed a bug in the CPU rendering of surfaces inside transparent materials.
Fixed in #Avoyd beta 0.21.0.871 https://www.enkisoftware.com/products
Thanks everyone for your feedback. Most answers congregated around an Absorption Length = 8 so we'll change the default Minecraft water and flowing_water to that in the next full release of Avoyd.
Took a break from improvements to the GPU path tracer to test making a stylized volcanic eruption using the Minecraft map the Continent of Lisrina by Dannypan.
@bwrensch I've updated the beta, and there's a hidden option for the .vox exporter in in the Documents/Avoyd/user.cfg config file. This is a text json file and if you search for ConstrainToMagicaVoxelSizeLimitations you can set it to false.
Currently this will produce garbage output if the file size would end up over 4GB, as the ogt_vox.h library I use uses a 32bit buffer size - but I'll fix that later.