color mapping problem

[Guest nazcaLine]

since i work with vray 1.5, i have a serious issue with color mappings in the windows areas.they appear DARKER than the rest of the image.

when you put a vray light in a window, that area is supposed to be brighter than the rest, and it has always been so. i always worked with vray 1.09 and never had this problem. but with 1.5, look at the picture: it's darker than the surroundings, it's impossible. i'm using exponential color mapping in 2 dark mult. (with hsv is the same)

i remember in 1.09 i could raise the drak mult up tu 6, 7 and everything ok. self- illuminatinfg materials, the same: they look darker, or underwashed, than the surroundings.

something has changed in color mappings??? what should i do now to have the same results as before????

please help, i get very odd-looking renders, never had this problem before getting into 1.5

thanks

Eduardo

[Ricardo Eloy]

Is the result always the same, even with affect background off?

[Guest nazcaLine]

yes, always the same.

why does it change this way?

anyone has this problem???

and it's not the file, i worked in several files in another machines and had this problem with 1.5

as i said, never had this problem with older versions

[Guest nazcaLine]

here's another example of what i'm talking about. look at the illuminated area at the end of the room: the zone hit by the light is DARKER than the non-lit area.

anyone has a similar problem???

please help, this is REALLY annoying...

 

p.s.: color mapping exponential, dark mult 3

 

Eduardo

[Christopher Nichols]

Sorry... don't use Color mapping. I do everything in proper linear space. However, it seems to me that you are lifting the blacks maybe the wrong way. Instead of raising the dark multipier, try raising the gamma to 2.2... Either that or start working sRGB space.

[Guest nazcaLine]

i just entered to the misterious waters of lwf and gamma corrction, intrigued by what everybody is talking about...i'm just beggining...by now, what i did was changing color mapping to linear, gamma to 2.2 and dark and bright multipliers to default 1...guess what...it worked really well...did the same with reinhard and it worked too...just put the burn value to .8, and voila...now what i have to do is to keep learning and reading the tuts and threads i've found so i can understand what i just did...lol:D

[Christopher Nichols]

Here is a brief explanation. Back in the old version of Vray the color mapper only had two setting... bright and dark multiplier. When in gamma corrected mode, the dark multiplier was actually a gamma correction. They then added a gamma spinner and the dark multiplier became what it actually means: multiply the dark colors. So what you ended up doing is define your dark colors to be brighter then your light colors.

[Guest nazcaLine]

understood (kind of...)

keep on learning...