about saved irradiance map

[stone145]

hi, im doing an interior render in 1.09, first i set the settings for irradiance map medium and see what i get in 600 x 400, using one direct, a vray light, and vray enviroment....anyway it looks good, then i re-render saving the irradiance map, afterwards i load the irradiance map and try to render the same picture in 2400 x 1600...

the irradiance map is not saved! what am i doing wrong?

[travistlo]

How do you know its not saved? What are your irr map save settings(from file should be checked).

Travis

[Arkitec]

you should only use an irradiance map that is 1/2 the size of the final image.

so if you map is 600 x 400 = your output size shouldnt be larger than 1200 x 800....

if you want the final image to be 2400 x 1600; save a map at 1200 x 800, then set it to use from file and render.

this is what many people have posted.

good luck,

Arkitec

[stone145]

ok...

so then what is the advantage of saving it? i assume that it is that i can render as many views of the interior view as i want...

anyway the thing is that i saved it and then when i load it it doesnt show in the render window.

i might as well try doing it half size as you said, but somehow it doesnt seem right.

[travistlo]

The advantage of saving just a single frame is that you can adjust other settings (that dont effect lighting) without recalculating the Irr map. The irr map you saved seemed to be too small when you reused it, like arkitec said.

[mOnitoRe]

what other settings do you mean? For example

[cpnichols]

Actually you don't need to do your irradiance map at a smaller res and then redo it with the saved IR map at a higher res. You can simply use lower settigns for your Irr map calc. Let me explain..

Every time you go down on the min/max settings you effectively cut the resolution of your Irr. map by half. SO

doing technically speaking the Irr Maps of these would be identical

min/max -2, -1 at 400x300
is equal to
min/max -3,-2 at 800x600
is eqaul to
min/max -4,-3 at 1600x1200
is equal to
min/max -5,-4 at 3200x2400

what will take longer at the high res renders is the actual rendering so it is good to test at 400x300 or 800x600 and then adjust your min/max for the final res.

Make sense?

[travistlo]

You can change the AA and test different settings, color mapping, materials (sort of). There are alot of things you can change, but just think if it effects the light bouncing, it will effect your irr map.

Just remember to rerender your Irr map after you changes material settings. Even though you can change some settings for your materials, you still want a correct Irr map before you render final version.