DOF - Successful test

[orei]

Re: DOF - Successful test

i can't set the aperture size for the depth of field in vray.. the option is grayed.. how can i do??
tried many times.. but nothing changed.. i can get the dof work!!!!

i don't understand what i wrong..

anyone that wanna help me??

thanks my friends

[sjirka]

Re: DOF - Successful test

Turn of the physical camera to enable using aperture or else control DOF by F-Number in physical camera.

[arqestevez1]

Re: DOF - Successful test

hi nektares.
it doesn't matter if you use sketchup in meters, vray still works with inches.
for focal distances i think this way: first change meters to cms, and then divide / 2.54
for example, if you have 18 meters, you have 1800 cms, and /2.54 = 708.66
if you have 3.48 meters, you have 348 cms, /2.54 = 137...
it's actually pretty simple

[orei]

Re: DOF - Successful test

The problem is.. that if i use the GI.. need to turn on the physical camera.. and with the Physical camera on.. can't change the aperture size for the DOF...

instead.. if change the F-number in the physical camera.. only change the light in the scene..

but the DOF.. only work correctly in the close render??

thanks a lot

[arqestevez1]

Re: DOF - Successful test

so, you mean there's something wrong with your vray?, because you should be able to change the aperture with or without phisical camera.
there's also another way. if you use phisical camera, you first set the focal distance, reduce f number to something like 7.5, and increase film width to something like 5000.
i do not understand why, but the bigger the film width value, the bigger doff effect. i usually work it that way, because reducing f number also makes your sceene brigther.
hope this help.
just be sure you're using the right focal distance.

[mjm223]

Re: DOF - Successful test

so, you mean there's something wrong with your vray?, because you should be able to change the aperture with or without phisical camera.

Just out of curiosity, are you able to adjust the Aperture with the Physical Camera setting on?

[arqestevez1]

Re: DOF - Successful test

yes

[mjm223]

Re: DOF - Successful test

Really?

Which version of V-Ray do you have? Are there any other settings that you have to modify in order to have that option available? Could you post a screenshot showing both the Physical Camera setting and Aperture setting on at the same time?

Sorry for bombarding you with all these questions, but I've been having issues with this for a while. I'm still trying to adjust to that Z-depth technique, but it'd be a lot easier to do some test renderings with the aperture without having to always bring the image into Photoshop.

Below is what my options look like everytime I turn on the Physical Camera. I'm using version 1.05.30, but this has been the case with every version I've used.

[thomthom]

Re: DOF - Successful test

Marcus - use the Override Focal length and enter the length from the camera to your focus point in inches. Then adjust the other settings to define how strong the effect should be.
Note that the focal length will always be in inches - as that is the internal unit in Sketchup and VfSU uses only this unit - not your modelling units.

[arqestevez1]

Re: DOF - Successful test

sure, here it is...

you know... i've been creating doff effect in vray without changing aperture value, i just set the right focal distance, change f number and increase a lot film witdh... why don't you try it this way?

[mjm223]

Re: DOF - Successful test

Arqestevez1, that's crazy! I wonder why that never happens when I turn on Physical Camera?

Thanks for the advice guys. I've been trying to change the Focal Length (or Focal Distance) and then adjusting the F-number and Film Width, but then I have to change the ISO value to compensate. I never know how much I'll have to change the ISO value to get the brightness back to where it was before I had tried DOF. So I end up having to do a bunch of test renderings and tweaking the ISO value until it looks right.

I'm just trying to find a way to use DOF without it potentially taking too many steps and too much time.

[arqestevez1]

Re: DOF - Successful test

hey marcus... yeah, for me it's easeier to set the focal distance and all those things instead of working with photoshop. you know, when i start a new project, i always change f number to 7.5 before i set my illumination, that way, if i decide that my render needs some doff, i do not have to compensate other values.
i think you'll find it very easy once you find your parameter, let me know when you get it so i can comment :P

[thomthom]

Re: DOF - Successful test

I never know how much I'll have to change the ISO value to get the brightness back to where it was before I had tried DOF. So I end up having to do a bunch of test renderings and tweaking the ISO value until it looks right.

Ditto - I think there are calculators out there on the net that helps. But I never remember it.
I usually turn down the settings really low, and do some quick clay renders to dial in the DOF.

[robert111]

Re: DOF - Successful test

i need a free Note Camera Point script pkz

[thomthom]

Re: DOF - Successful test

i need a free Note Camera Point script pkz

Have a look over that Sketchucation, Smustard or Sketchup Library Depot.