Disables shadows for small parts to improve performance

ShadowOptimize.luau

local ChangeHistoryService = game:GetService("ChangeHistoryService")

local minSize = Vector3.new(5, 5, 5)

local recording = ChangeHistoryService:TryBeginRecording("Disable CastShadow")

for _, descendant in pairs(game:GetDescendants()) do
	if descendant:IsA("MeshPart") or descendant:IsA("Part") or descendant:IsA("UnionOperation") then
		if descendant.Size.X < minSize.X and descendant.Size.Y < minSize.Y and descendant.Size.Z < minSize.Z then
			descendant.CastShadow = false
		end
	end
end

ChangeHistoryService:FinishRecording(recording, Enum.FinishRecordingOperation.Commit)