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I use the specular SOP to make a Backlight Light FX in mantra, may I know how can I do the same FX in Octane

Hey that's a nice effect ! Maybe look into using the "mix material node" with a " polygon side " node as switch input . That way you can use a opaque front side material and a self illuminating( emissive ) back side with transparency for the pattern you've created .

WoutTgh wrote:Hey that's a nice effect ! Maybe look into using the "mix material node" with a " polygon side " node as switch input . That way you can use a opaque front side material and a self illuminating( emissive ) back side with transparency for the pattern you've created .

that's no really work, this FX is only illuminating on the shadow, so if I light up the environment, the illuminating FX probably all gone (maybe some will let on shadow)