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Zbrush 2018.1 - Decimation Master Memory Problem

Hi,

I have a problem with decimation master.

Sometimes,I’m working on some models over than 20 million polygons and than using decimation master for optimize (mostly render,I don’t want to export displace maps also don’t want to do retopology,uv, etc.,).

Anyway, Decimation master is working properly but if I decimated only model ( No uv and texture/polypaint )
If I want to export uv ,textures/polypaint ( min 4K ) , DM always gives the same error ( not enough memory or runtime error )

I tried on simple sphere for this problem.I subdivided 7 times , about 33 million polygons.
No uv and textures is OK but with uv and textures/polypaint (keep UV is enable on DM), I saw same issue over and over again.

How can I fix this problem? It’s about my RAM or other devices?
I have 32 GB Ram

I’m waiting for your solutions.

Best regards…