[Garkin]

EDITED:

This zoom animation is done in function ZO_InventorySlot_OnMouseEnter(inventorySlot). However this function uses local table InventoryEnter, so it won't be easy to redefine it. You will need to copy function without animation part and whole InventoryEnter table.

I was thinking about changing endScale for each slot (buttonPart.animation:GetFirstAnimation():SetEndScale(1)), but animation will still be called at least for the first time.

Maybe redefining template, but is it possible without hooking ANIMATION_MANAGER? This seems to be too much "hacky":

XML part:

<GuiXml>
    <Animations>
        <AnimationTimeline name="New_IconSlotMouseOverAnimation">
            <Animations>
                <ScaleAnimation duration="125" startScale="1" endScale="1"/>
            </Animations>
        </AnimationTimeline>
    </Animations>
</GuiXml>

Lua part:

local CreateTimelineFromVirtual_orig = ANIMATION_MANAGER.CreateTimelineFromVirtual
ANIMATION_MANAGER.CreateTimelineFromVirtual = function(self, template, ...)
    if template == "IconSlotMouseOverAnimation" then
        template = "New_IconSlotMouseOverAnimation"
    end
    return CreateTimelineFromVirtual_orig(self, template, ...)
end