Stewer - I have always assumed that there was a direct relation between the quantity and size of texture maps used in a render and the RAM usage - ie. a 2048 square map would require less RAM at render than a 4096 map - but you're saying that's not the case if I'm reading you right.

That's great information, thank you - it changes the way I look at texturing for Poser. Think I might have to rebuild my current project :)

BTW, I re-rendered (had the test scene saved, so just started up and plugged in the exr map) - 5 sequential renders timed at 6m32s, 6m24s, 6m17s, 6m11s, and 6m12s. Thought it might be the case as before running the tests above I'd made a series of test renders with the various maps to get the displacement values, so they all would have been converted.

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