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I modified the palette so it produces a redder MFIG giant instead, thus gaining a new variant without assigning a new slot. This would now produce four fire giant variants - the default, the redder version, the previously unslotted BG2 variant and the IWD fire giant.
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I'd love to have a "canon" fire giant (coal black skin, flaming red or bright orange hair per the 2e MM) as well as female giants, but those are probably both well beyond my skill and patience.
If you think you can produce a better tweak of this palette (and I've no doubt you could) be my guest. Otherwise, I'll probably just include it with the base installer as it is only a ~2 byte file.
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