I am in the learning process of Blender, currently working on my own interior environment and I would like to use eevee for rendering. I have a problem with indirect light baking and irradiance volume (IV) in particular. Problem is that whatever I do, I am not able to get a satisfying result without shading issues, artifacts and sometimes spiky shading.
I watched numerous tutorials, problem is that all of them consider simple scenes such as plane, sphere and sunlight, or simple rectangular room with window and basic furniture, nothing really advanced. My interior is quite complex and it´s not shaped regularly, it includes some curved walls and numerous props. You can see the environment in attached pictures. Following one shows the best baking result so far but not good enough because it still has some artifacts and irregular light on the ground, particularly along the wall with light strip. I spent 3 days and endless hours trying, doing bakes, different settings, different resolutions of IV, I tried one IV, more IVs for different parts of environment etc, unsuccessfully. I tried even some insane resolutions (50 by 50) but the result was shit, it was better with lower number of probes. With model like this, it is almost, if not completely impossible to place the volume without some probes being inside of geometry and causing problems. How would you solve this? Is it even possible? If I use more probes (higher resolution), I can´t avoid bugs, if I use less probes, diffuse light on the ground (mainly) looks bad. Sorry for long text but after so many unsuccessful attempts, I feel really desperate and I have no idea what to do. I also attached solid shading picture so you have idea about what my model looks like.