when i run the script, im still getting lava at bottom of world and when i get near the lava it just evaporates. kinda hard to explain the bug.

Void.registerGenBlockRep("minecraft:lava", "Railcraft:cube", 6)

in nether this code works fine but in overworld it doesnt work. i think this is what been causing me lag for so long. i can show you on a live stream of the bug.

Lava in the overworld is a feature, not a generation block. As such, it can't be replaced with that command. You could remove it with the removeFeature command, but that's about it. I'm considering adding a way to replace blocks after everything is done, but I can't guarantee anything.

i did turn counts to 4-16 and in game only 1 spawns

also water color on newest version doesnt show its color on minimap like it did before. in world its green and minimap its blue lol, but back few versions ago minimap did show green water, same for tanks/barrels

also is there a way to add in feature or text message in game when a line or lines fail to run due to error. cuz its hard to bug test what i make not knowing if there is any issues with my script.

yea i found a mod that removes everything in overword and now i have no lag at all. so im all good there.

im also curious this is bit off topic, for this command?
addSpawn("crazypants.enderio.entity.EntityWitherSkeleton", "MONSTER", 1000, 8, 16)
whats the max chance that can be used cuz i wanna spawn HORDES of mobs at night

what if u made 2nd mod that can replace any block with any block?

I'm looking into adding that functionality into BiomeTweaker, actually. The chance you can put in that command is pretty much unlimited. Just keep in mind the sum of all them must be under 2 billion (2,000,000,000,000). If you're looking to spawn hordes, I'd turn up the max and min spawn counts, rather than the chance.

Not sure about the spawning issue. I'll look into it.

Same for the water color... I haven't even touched that code since I made it... I'll look into it.

Are you reading the log file in "logs/fml-client-latest.log"? That is where all the output is done. BiomeTweaker will output errors there if the script fails in some way.

Is it a specific biome that the water color is not appearing? Also, I'm going to need a full log to investigate that issue.

Closing this for inactivity.