Irradiance Map Settings for details

[cgrande]

Using Vray Advanced 1.09.03n with Max5
Can anyone recommend what settings to use for detailed areas like moldings on a wall? There are 2 walls behind this view and one vray area light above. Sampling for that light is set to 5. Could that be the problem? I can raise the Hsph subdivisions, or secondary subs, or maybe go into custom and play with that but not sure what will fix it the fastest. Also there are the advance irradiance map paramters. This map calculation took 15minutes on a xeon 3.2 dual. The res was 500x375. The calculation was alaso done at that resolution. Ideally what resolution does the map have to be if the final rendering is going to be 4-6 times larger?

[cocolas]

try checking "check sample visibility" in the advanced rollout and bumping your direct computation subdvds to 3 or 4 .....


paul.

[cgrande]

let me start with that. Also, I increased the area light subs to 10 and it cleaned up some areas but not the tiney crevices in the molding.
I'll return my results in an hour or so.
thanks

[natty]

yeah all the above ...and your interp sample are too low ....and AA put the max upto 3.

[cgrande]

yeah my image sampling needs some help but Idont think the blotchy areas are due to that. Will put them up.
Which interp samples? The ones in the GI rollout or the Advanced Irrandiance Map Parameters?

[cgrande]

What resolution do you recommend the irradiance map should be calculated at if the final image will be rendered at 3000x3000? Right now, we're just doing 600x600 calculation, using 'from file' and rendering out the larger one with all the maps, reflections, etc. I think we tried to do a calculation with a larger res but it took longer. Could that also fix blotchyness?

cg

[natty]

yeah your GI Interp samples are way to low ... double it at least.

[deneb26]

hi cgrande,

as i can say for me, i don't mind if it takes a bit longer for gi-calculation. and therefore i always use the final resolution for both gi and rendering (3500x2400 approx.). the render-times are about 5-7h. the pc's mostly do the jobs overnight, so...

greez
ale