but then if it is the light cache , does it mean there's no hope for using it?
If you figure out which materials are slowing it down, you could try adjusting those problem materials (fewer subdivisions, use bump instead of displacement, etc.) then try LC again.
Cool, didn't know that. I do know rendering without an AA filter and sharpening in post is supposedly less accurate than rendering using a filter. I'm sure that's correct, but I've not noticed any adverse effects myself.
i think photomatch was done as reference and then the model has been remodeled and rendered completely.. the after image is completely different from before. they are completely diofferent but the good thing is they are using the same camera view. so photomatch is the answer.
There's quite a number of things that could be the problem. Since you say the image came out dark, my guess would be that the irrmap file you have and the view you are trying to render don't match. Try saving your irradiance map from the scene you are trying to render. If you are loading from another machine or from another scene, you may have issues using a saved map.
When you use high quality settings for IM (subdivisions and such) you're starting to loose detail, geometry is "floating". Lower the settings, or, use detail enhancement, or, my favorite one, use AO.
Cheers!
