API Feature Request: DensityVolume.cs: Initial offset of density mask field

Hello, guys!
First of all, animated density volume looks great! I love it! But there's one thing missing I found after tested it and researched API:
Animation of the same density mask texture in different volumes leads to the same synced animation (no random seed). Also there's no initial texture offset used in animation calculation - current texture offset is totally based on current time. Would be really helpful if you add initial texture offset to animation calculation formula and grant public access initial offset field.