Maya Mental Ray leaks memory; won't render scene

I have a scene that was working and rendering fine a couple of days ago. Lately, however, every time I render it, the window appears white, and Maya's memory usage jumps to as much as it can access (about 1.7GB). Eventually this causes Maya to crash. I have tried batch rendering and IPR rendering and they both have the same result. I have also reset the render settings and tried hiding all the geometry. I am honestly stuck on this.

Here is the scene without linked textures: https://mega.co.nz/#!XYdEkBSY!CLgOECFdeMVlCH33TJ6p7irWOJJwT98DIAI4x

It's tough because I was ready to render and now it won't for me.

I havent looked at the scene yet. however run "optimize scene" and see how that plays out. it may have excess nodes that maya doesnt need anymore for the scene.. make sure objects have clean history too.

Are you rendering with mental ray?

In a complex scene, often a few quick changes to your Render Settings can help:

1. Set your primary renderer to "Raytracing" (Render Settings, Features tab)
2. Set your Acceleration Method to BSP2 (Render Settings, Quality Tab, Raytracing section, Acceleration subsection)
3. Set your Performance for mental ray to "Export Objects on Demand" (Render Settings, Options Tab, Performance section)

Just some quick ones off the top of my head...

1.7GB is the max?

How much is on your machine?

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