Reusing IRRADIANCE MAP and LIGHT CACHE with few changes

[VISUAL3D_1]

Hi,

I am in a situation where I tried to render a huge image. 3ds max crashed during rendering, but because I had autosave on in Irradiance and Light cache maps were saved.

3ds max crashed because of not enough memory, so I have to make some changes for the next rendering of the scene. My question is can I make ANY changes to scene or its settings and still use those saved irradiance and light cache maps or do I have to calculate them again and waste precious time?

So can I use those saved maps with these following changes or any of them:

- Changing render size
- Changing color mapping dark and light multiplyers
- Changing large texture resolution to smaller in Photoshop
- Reloading that texture in material library just to make sure it´s not corrupted
- Changing V-ray bucket size
- Turning on Bitmap Pager option in 3ds max

[vlado]

You should be able to reuse the maps in all of the above situations.

Best regards,
Vlado

[peprgb]

The only exception isn't the Interp. samples?¿ thus, changing this we have to recalculate maps...(??)

I read this time ago in this tut from James

[vlado]

If you mean the irradiance map interpolation samples, these are used for the final rendering, so there is no problem to change them after the map is calculated. If you mean the light cache interpolation samples then you will need to recompute the irradiance map (no need to recompute the light cache itself).

Best regards,
Vlado

[VISUAL3D_1]

So can I for example save IR map that was calculated for 320 x 240 resolution rendering and reuse it for rendering that 800 x 600?? Is there a lower quality in the final rendered image using this method, than if I would calculate the IR map again with 800 x 600 rendering?

[vlado]

You can reuse it; the result will be as though you scaled the image (e.g. there won't be additional GI detail).

Best regards,
Vlado

[VISUAL3D_1]

Great! Thanks a lot for the answers.