Saving and loading irradiance map effects quality of render?
-
Hello i got this concern and no matter how many tests i ran i cant get a conclusion to put my concerns in peace... hopefully there's a pro here who can answer this questions with 100% certainty.
1)if i save the irradiance map in lower res. render and then load it when im doing my final high res render so vray wont have to prepass again, will that lower the quality of the final render in anyway vs. doing the prepass in the full final high res. render?
2)if i load the irradiance map from scene1 and use it to render scene2 (different angle for same space) is that ok? or does it messes up the render?
3)if i saved the irradiance map and then apply changes to the model (not the light) add something change reflection stuff like that, does that makes my irradiance map irrelevant and needed to be rendered again or not? same question regarding changing the light a bit?
this 3 questions driving me mad i cant seem to see differences.
thanks for the help in advance ":]
-
@bizkonson said:
1)if i save the irradiance map in lower res. render and then load it when im doing my final high res render so vray wont have to prepass again, will that lower the quality of the final render in anyway vs. doing the prepass in the full final high res. render?
You can run a half size IR and LC Pass with out any noticeable loss of quality. For example, your final render will be 8000x4000, your IR (irradiance map) and LC (light Cash) pass can be 4000x2000.
@bizkonson said:
2)if i load the irradiance map from scene1 and use it to render scene2 (different angle for same space) is that ok? or does it messes up the render?
No. IR and LC passes are scene specific.
@bizkonson said:
3)if i saved the irradiance map and then apply changes to the model (not the light) add something change reflection stuff like that, does that makes my irradiance map irrelevant and needed to be rendered again or not? same question regarding changing the light a bit?
You might be able to get away with it if its not to drastic a change. But again, its scene dependent.
-
Thanks a lot man! This will help in the stressful deadlines.
Know I can save the ir-map half size and no effect to render is great! -
One quick way to use an LC map for multiple frames is to set it for animation. It will calculate for all the frames at once, then you can use the same map for all your views. You do need to set the samples higher - like 1600 or so (instead of the default 800)
Advertisement