Who needs to turn on the gas stove take the light)
The flame is made by geometry with procedural maps
materials are hand-tuned for Corona and Vray.
The burners are symbolic there is no specific brand of gas stove in the scene.

The archive contains max files for Vray and Corona in Editable Poly and separately max files with an open modifier stack and instance objects.

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SHADERS:
Vray 3.6 / Corona 5
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ARCHIVE:
Models – max-2013 fbx obj
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UNITS:
System – mm Display – mm
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MESH:
Flame (no burners) – Polys: 143360 Verts: 134960
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MODIFIERS:
Model in Editable poly. And a separate open stack file.
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ADDITIONAL PLUGINS:
No

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BE CAREFUL:

!! Vray 3.6. In the version below 3.1 be careful – in the materials in the BRDF section there is Microfaset GTR (GGX). If your version is older than 3.1 the BRDF field will be empty. Choose Blinn Phong or Ward – which is preferable for you.

!! Corona 5. For Corona render it is recommended to install version 1.5 or higher as the glossiness of the materials is adjusted taking into account PBR.