This is a refactored version of Scotties Voxel Terrain demo published back 2016. I've tweaking the inner loops and data mainly to try and squeeze out from performance from the demos code, adding gouraud shading and depth queues to the terrain.
This version has been refactored and includes various common tips when speed up work heavy loops, as well as a few ideas on speed up voxel, by simply not sampling the ground at the same interval, so the further the ray gets from the camera, the ray is moving in bigger steps. So it's accurate, but the result isn't much different from the simple version. If you going for max speed in PlayBSIC V1.65 then there's still a couple places within the inner loop that could can tweak further..
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