If you use a tool with global illumination, so it's not up to you to fake how the light bounces, but it's calculated for you, then you're much less likely to ge

If you use a tool with global illumination, so it's not up to you to fake how the light bounces, but it's calculated for you, then you're much less likely to get the problem you describe. If the tech you want to play around with doesn't support GI, then at least you can use one that does to create a reference that you can follow along with on your target platform.