A fair comment Teyon, but in this case it's not the alternate diffuse effect that's missing in the render, but seemingly anything plugged into the main diffuse color that has animated parameters, i.e. the diffuse color itself and the blush mask strength and colour (variable changes show up in the OpenGL preview perfectly but fail to render in FireFly). This seems like a bug in how firefly interprets animated variable inputs, or, at least, a problem with how the shader nodes are fed into the firefly render engine.

I'm really loathe to bake the textures or de-animate the variable parts, because the whole point of the exercise was to have a blush response on demand in an animation, which can't easily happen with baked textures.

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