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Mantra non rat error and IES

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jbond
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Joined: June 2012
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Hi!
When I set MANTRA_NONRAT_ERROR=1 environment variable Houdini doesn't allow me to use IES files in light's Environment/IES map field and throws the error.
mantra: Texture ‘DMaps/IES/4.IES’ not in .rat format. Unset MANTRA_NONRAT_ERROR to allow use of this texture.

So since IES is a custom non-graphical format what is the workaround for that issue?
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