You got it right. Animate the light's intensity. With a fast attack and a slow fallow & orange tint towards the lower brightness if you want light bulb style flash instead of a LED style flash.
The characteristic thing about a flash is not necessarily the light, but the glare. So turn up glaring to get that, which is what actually creates the flash look, see image.
edit: A flash is very short, so 1 frame only for an LED style flash, unless you want something artistic. Then disregard this.
« Last Edit: 2019-06-18, 06:03:33 by SairesArt »
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