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development photo montage


Stan Zaslavsky
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hi all and a happy new year

 

i haven't posted in a little while, now is time to get back into the swing of things so looking forward to a great year of learning and growth

 

this one is causing a little headache - i need to get this development model into a photo with accurate orientation, lighting and the rest

 

first image is the render and second is where the development should be placed into

 

the render model is completed - but i just can't get the lighting to match up - i'm using mr, settings: as per photos exposure values (1/500s, f/5.6, ISO - 125). i've also set up the mr sun to be in the correct position as per when the photo was taken.

 

any clues why the image is coming out so dark would be very helpful?

 

thanks a bunch in advance

 

cheers,

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First off a plane underneath the building so that light can bounce off it and illuminate the walls.

Well it can be the strenght of the sun, the sky, the colour mapping values, the camera values or the material colour values. If all is set properly try and adjust the colour mapping values.

 

I wouldnt say that it is neccesary comming out dark, more washed out.

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hi horhe

 

thanks for the feedback - you're absolutely right on the 1st one - i've put the plane in and now the image is much brighter. i also agree that the image is more washed out - thats probably the function of my exposure settings in max and the gamma settings - so i'll play around with that further

 

how do you mean colour mapping values though?

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Hi Edson,

 

thanks for your feedback - i'm using AO as its inbuilt into the Arch & Des materials

 

shadow wise - working on that one ;) - i took out shadows to the ground for the moment

 

is there a way to make the model drop shadows to the ground and then in photoshop apply these shadows to the appropriate areas on the photo?

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thanks Claudio - much appreciated

 

i've put one in - but my rendering is still not quite matching up to the photo - so i think i need to get the sitework on the south side of the building in - then the lines will match up.

 

i know we've gone through this one before in some detail - but aside from lofting a slope to get a terrain - is there a way to connect four splines together to form a terrain? Some sort of bridge command?

 

cheers,

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well after a bit of experimenting - here is a matched up rendering

 

i'm still not 100% on how to use alpha channel to create a shadow to map onto the existing photo - i've worked out how to bring the image as a selection into the existing photo and mask out areas to blend the image a little better.

 

looking forward to your c&c

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Hi Stan,

 

using the pole as a reference, there are no noticeable shadows casting at all. You could just get away with using the environment or an HDRi to provide illumination and occlusion for this one, maybe with a very weak sun/ directional light.

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Ugh.... I hate it when a client gives me photos like this; where there's either a tree or a utility pole right in the middle of the image!... I've been there too many times. In regards to trying to get the shadows into photoshop, I'm not so sure about MR, but I know in vray you can use the frame buffer to render the shadows in a separate pass. Maybe that shadow / matte material does the same thing? From there, you can composite the rendering, and the shadow map pass (on separate layers) and use the blend modes in photoshop to affect the layers below. I hope that makes sense....

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Cool thanks - it does kind of make sense.

 

With the frame buffer - is that a VRay term? or is that a max function?

 

because i find that if i hide the building and just render the matte/shadow plane - it leaves some weird discolourations on it that look like shadows - but they're not quite shadows. so i wasnt sure of how to convert this to a transparent shadow effect.

 

cheers and thanks for your feedback

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The frame buffer is a feature within vray that allows you to render separate channels of information, such as depth, shadows, reflection, material ID's... it's unbelievably useful, and unfortunately I don't know MR well enough to say whether it has a similar function. I guess what I would do is create a separate image using the matte/shadow material that claudio mentioned, and overlaying that with the blend modes in photoshop. Like I said though; I'm not too familiar with MR, so I'm making a suggestion based on an assumption of how that matte/shadow material works :D

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I think you need to up the exposure a bit and brighten the thing up. I know you are probably working to correct exposures but if you look at your physical sky compared to the sky in the photo you will see its considerably darker. I suggest upping your iso on your camera. I hope you dont mind but I did a quick test in photoshop, just masking off your building and brighting it up. I also brightened up the photo in the background a tad, but that was just me playing about (i cant help myself)

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hey stan this is looking really good.

 

For the join i'd either lower that stepdown so the new property joins flush with the photo or perhaps put a small curve on that hard edge, kinda like at the end of a driveway how there is a small stepdown but its got a curve...

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  • 2 weeks later...

looks great stan!

 

If that car wasn't such a rare model i'd swear it was part of the original picture.

 

Shame the sky is blown out so much. A nice blue would really punch up the image.

 

I think making your windows a little more reflective and having them reflect something would also have a positive effect. I think your shadows on the model itself are good but the shadows being cast on the photograph are way too dark.

 

Wd ;)

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