Bright buckets in DR

[tricky]

I haven't seen this for quite a while, but I am getting some buckets on a DR rendering with the correct texture, but they are a lot darker than the others (the bright ones are correct). The bitmaps are on a shared network drived and they are mapped indentically on each render node and on the host workstation.

This is with Vray 1.50.00 on Max8 SP3.

I had always thought that this was due to one of the rendernodes not connected to the network properly, but in this instance, they are seeing the bitmaps OK (on the mapped 'resource' drive) and seeing the scene OK (on the mapped 'work' drive) and getting instructions to render OK.

What could be going wrong?

[DaForce]

Often this can pop up with the . and , problem for the decimal place.

Also its often just a maps problem, try copying the files locally and see if that helps.

[tricky]

I've seen this suggestion with the ',' and '.' before but don't quite get what it is referring to - please expand.

[DaForce]

In the windows control panel, under regional and language options, click on customize, and make sure the decimal symbol is a . (dot)

[tricky]

Yep - its a dot.

This is very strange. The bitmap used where the buckets render dark is situated on our 'work' drive in the project folder I am working on as it is a project specific bitmap.

If I copy this texture (a .png file) to the 'resources' drive where the vast majority of our textures are and in material editor select to use the bitmap from this new location, it looks dark, but if I switch back to the 'work' drive location, it goes bright - and this is just in the material editor! Its the same darn bitmap!

Eh????

[DaForce]

oh wow... consider me stumped..

ahh could you upload 2 shots.. one of the material editor with the png linked to in the each location just so I can see the differences..

so weird. Must be something tho...

[DrJan]

I've had this problem as well and it turned out that I was running VRay 1.5 RC2 on one system and RC3 on another.
But I doubt that that's the problem... (although you never know )

[tricky]

I think I have a poltergeist! Now the problem seems to have gone away!

Basically, I think Max may have been getting confused with the gamma on the bitmaps - I told it manually when picking from either the 'work' drive or the 'resources' drive to use the default system gamma (which is 2.2 for bitmaps) and it brings them both in the same now (even if I put it back to using the 'images' gamma).

I'm getting another coffee!

[DaForce]

ahh right.. stupid max.


mmm coffee.. yoink

[tricky]

Yep - I think a cup of coffee poured into the back of my computer may also do some good!

(and I have just ordered another 8kg of premium coffee beans for our office....ahhhhhh)

[vize]

tricky: do you use summed area filtering in the bitmap settings? try to switch to pyramidal everywhere

[DaForce]

Or just turn filter off all together