Hi, thanks for the reply, it's very simple to recareate the "bug"(not sure if this is can call a bug...) but anyway, please hit 0 to open render texture window, then select an object in 3d viewport(anything, could be a teapot for example), then create a light and setup lightmix pass like as usual, then hit the render button on that "render to texutre" panel, you will see the vfb pop up saying all the lightmix lights are missing. that's all. seems like lightmix is not supported on render to texture? or maybe just a bug? because there is no reason when normal rendering support lightmix but when hit the render button on that panel will not support. thanks