Good initiative!
Diaboli (as talked about in a PM): Their oil black skin conflicts with both the art, and the properties of 3D graphics and art. Black can not be used as a *good* texture, so the race description must be changed.
NWN had the option for black skin colour (which was truly black), and while some features get obscured by that, it's realistic IMO. Not to mention that anything that's not a feature of the skin itself won't be affected, and in fact make for interesting effects of contrasts. I still don't think it's a good idea to let possible technical issues impact the settings.
I'd rather see a reevaluation / change of the name "Diaboli", since it betrays the RL origin while having no backing in the setting, in addition to creating a false image of that race (some people mistake them for some sort of demons).
About the earthquake thing: wasn't that already removed in 2005?
City sizes: it has been said that Hydlaa will not become significantly larger than it is now. However, in this case it won't be doing justice to it's purpoted importance and population. Same for Ojaveda.
Since the CC has been mentioned: the option for a "Crystal eclipse" doesn't work in a MMORPG, since obviously the crystal would have to become dark for extended amounts of time to accommodate all the characters, especially since this event can be selected without any regard to dates.
CC: "Ravens on house": Do ravens even exist in Yliakum?
The CC's months and corresponding "dieties" are problematic as well.
This isn't technically an incosistency, but it's something that should maybe be erases before it becomes a basis for other things: Jayoses book on familiars mentions "sack-like creatures". Is it really necessary to take things that far? Wouldn't this, if Jayoses interpretation holds true, mean that someone who was no diety did create life, while Laanx or Talad had to resort to using the crystal? Wouldn't it be better to leave this whole life creation business to dieties?
mainsite->history:
The cave below Yliakum has a problem as that Laanx "discovered it" (center of third epoch), yet since Laanx and Talad enlarged the cavern of Yliakum, after having traversed the planet this far, they should have known of it (especially if they'd have had to enlarge the stalactite itself).
Both Laanx and Talad could traverse the planet's crust down into Yliakum (center of first epoch), yet Laanx had to wander the stone labyrinths instead of just going through the walls (start of third epoch; emphasized by the Lemurs being able to follow Laanx). This can be explained by his mental derangedness, though.
I assume that Laanx and Talad were able to remain ignorant of the SL (end of first epoch) because they travelled close to the crystal and didn't research the tunnels during the enlargement of Yliakum and diverting of underground rivers, and likely mistook them for simple cracks in the walls, since the Yliaki did obviously readily discover them, as did Laanx to wander them (start of third epoch)?
The cave below Yliakum, as well as the stone labyrinths, have the problem that they couldn't support life, as they don't have any source of energy. Laanx gave to the Lemur in Kadaikos "powerful things" to light the cave (third-last paragraph in third epoch), yet the lake and the cave already held creatures before Laanx even arrived there. The energy could not have come from organic debris flowing out of Yliakum through the waterfall into the lake, because Yliakum also didn't exist, let alone be populated, for long enough for life to evolve. The stone labyrinths don't have any source of energy at all, unless there
is life on the surface, which reaches the SL in sufficient quantity to sustain life there.
More inconsistency regarding the arrival of the races in Yliakum: as stated "they arrived around the same time", yet (end of third epoch) Laanx had time to wander the SL for "many generations of Lemur", and then rule Kadaikos for "a period" until remembering Voduls promise of luring other races into Yliakum which "were supposed to arrive in few decades", meaning that the time difference would be
several centuries by now. If the time difference really is this large, then the date of 750 AY has trouble being "long", and the Octarch's decree book's date would be only slightly older than when the other races arrived, meaning that the octarchy would have had to have evolved already in the earliest days where only Lemur and Kran existed in Yliakum. Alternatively, the date "0 AY" would have to be more or less after the estabilshment of the Octarchy, thereby being significantly different from the first Lemur's existence.
Center of fourth epoch: Laanx sent an avatar to lure the Dermorians away from Yliakum. That obviously didn't succeed, but why and how should be explained as well. Also, where is that cave "full of water and game" they were supposed to be lured to?
Vodul allegedly revealed the glyphs to Laanx and Talad (fourth paragraph of third epoch). However, they didn't seem to need them, as they could just "draw magic from the crystal" and do some rituals copied from Vodul (third paragraph of second epoch) (problem: if Vodul uses these rituals, they are specific to the crystal, therefore Vodul would have to 1) create people on more than on occasion and 2) use the crystal for this).
Talad gave up any hope to be reconciled with the old friend and, now alone, turned his thoughts to the people left in the town they had created. He called it "Hydlaa", the name of the most powerful glyph, that Vodùl had revealed to Laanx
The error of "city" vs. "world" and "Yliakum" vs. "Hydlaa" is also still present in that section (near center of third epoch).
Also, why would Vodul know about these glyphs, or have spent time researching them, if this really is merely some remote planet with no significance to any of the implied "older" gods? If he did so in his property of being "god of future events" (thereby more or less tricking Laanx and Talad into doing what they ended up doing, by deliberately letting Laanx observe these rituals, in which case he would have designed them especially for this occasion), then this should be explicitely stated. He would still, as said above, have had to create people using them.
and that led Talad to ignore prudence to satisfy his pride. Waiting for the day when the other peoples would come, he forged magical power into many shapes, suitable to be used by the mortals to help them to survive underground: he created the Glyphs.
Now Talad created the glyphs, which were previously revealed to them by Vodul? Given that "glyphs" aren't material objects but instead magical properties placed onto some object for transporting purposes, Talad would merely have transferred some glyphs on objects instead of creating them? Otherwise, the appearance of glyphs mentioned in the Q&A would have to be a direct involvement of Talad himself.
Laanx and Talad "prayed" to Vodul. This word seems to be out of place, especially since neither Laanx nor Talad seem to actually worship him in the religious manner "pray" implies.
More inconsistencies WRT Lemur origin:
The race description (mainsite->races->Lemurs) states:
Everyone knows that the Lemurs were the first of all races to settle in Yliakum, and they are proud of it. The legends tell that their origins of the Lemurs are connected to a huge city located in the depths of earth, abandoned from a widespread disease. No one knows how to reach this city or if anyone still lives there. All lemurs share a sense of loss for their mysterious, distant homeland.
This means that they either came from some cave-city (consistent with the reasoning in their physical description), thereby
not created by Laanx nor originating in Yliakum, or they were created in that cave, and not in Yliakum (inconsistent with creation story in both location and physical traits / reasoning).
Edit:
mainsite->settings overview, last paragraph (Waste):
Ducts that have been dug out in the rock are used to dispose of human waste. Larger rubbish and bodies are simply thrown into almost vertical and apparently endless wells. Nobody seems to care about where all of this junk finally ends up, since the stalactite theory is only devised by some Xacha scientists and has not been proven yet.
Are these two different types of tunnels, one set dug by Yliaki, the other set preexisting? Also, these "unknown" tunnels can only exist in the walls of the stalactite, since otherwise they
must end near the bottom of each level, meaning that people living elsewhere can't easily use this method. Additionally, if these tunnels are still being dug, then the law against mining might just as well be repelled, especially given that "mines" in medieval times hardly compared to modern mines, both in depth and in extent.