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Hi,
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<div>I am using the vGATE 9.0. I want to switch on the optical physics and as far as I understood from the manual the
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<div>GATE_USE_OPTICAL variable is OFF by default (<a href="https://opengate.readthedocs.io/en/latest/generating_and_tracking_optical_photons.html" id="LPlnk">https://opengate.readthedocs.io/en/latest/generating_and_tracking_optical_photons.html</a> section
5.1). Is there an easy option to switch it on from the virtual machine environment of GATE?
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<div>Best</div>
<div>Theo</div>
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