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atrodler

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Reply with quote  #1 
there is always potential...

before and after.

theatre block wide 1.jpg  theatre block wide 2.jpg 


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jlo

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Reply with quote  #2 
Not a fan of the purple but everything else looks great! 
arqcova

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Reply with quote  #3 

cool! is not an easy job the photo matching (well at least for me) and the masking for the cables, great job on the post-production!

matching perspective, etc. nicely done!

the cars and the added architecture, sun direction, a lot of care in this work


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atrodler

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Reply with quote  #4 
Hey Thanks.
I used to struggle with getting the perspective right until I started using the match photo option. It is a little bit of a pain to get the perspective and scale right but when you do, the rest is cake, just have to build the model. The one thing about a photo in terms of perspective alignment is that a photo doesn't lie so technically speaking a precise camera orientation can be calculated and set... you just have to be willing to tweak the match photo grid work in the model so that it matches the photo. 

With that being said, now that all is aligned and in harmony, the more of the model you build the less you have to manipulate in PP. I try to make it so that as much PP as possible occurs at the edges of the image. 

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jlo

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Reply with quote  #5 
I love sketchup photomatching! i find that i still have to fudge the rendered output to match into a picture though as podium slightly skews the output probably the way in which the "camera" works. Unfortunately, podium doesn't render the matched photo with the model itself so they need to be combined in PP after render (maybe it just doesn't align properly- i don't exactly remember). 

Its also important to mock up any object that will cast shadows onto the model so it will cast those shadow properly... and any reflected materials have to be considered as well. 

These results are stunning. I would be hard pressed to say it was fake if i didn't already know it. Maybe the asian lady gives it away or some super minor things but i think i would be tricked on this one. 
atrodler

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Reply with quote  #6 
I love it too... now. We had a rough relationship in the beginning. I have no trouble aligning the two images though. here's what i do.
  • from sketchup I export my scene with nothing on but the background (before) photo at whatever resolution I want. 3840 x 1870 if you want to know, which corresponds to my monitor ratio. 
  • then I turn on all the layers I want rendered, and in the edit style tab turn off the foreground and background photo. (uncheck the boxes) this turns off the photo.
  • I run podium for the same scene with the exact same resolution as the initial sketchup export.
  • that's it. I open both images in photoshop, drag one into the other while holding the shift key, and go on with PP from there. no alignment issues.
What I don't do is open the photo I referenced, try to combine, and then work off of that. I always use the version that was exported from the scene. I don't care about any extraneous "stuff" around the periphery of the image because I crop when I'm done anyway. by extraneous I mean empty space, or sketchup space, or podium rendered space. 

Since I model the entire scene and set the geolocation and time frame to match the photo, all shadows are present and accurate with no holes or areas not accounted for. Once in awhile I'll have to run a mock up for something but by modeling as much as possible, I then don't have to worry about it... let the podium do the hard work for me.

As for reflections; minus anything picked up in the model, there is a backdrop in there that expands for a bit more than 270°. So, everywhere except directly behind the scene simply to alleviate a headache in PP.  I copied one from the browser with similar characteristics three times to cover the entire span. It actually shows up on the edges of the rendering but, again, since I crop, who cares what shows up on the periphery. 

Of course there's always a bit of actual editing as I didn't model any wires. So I had to carry them through from the base image. and the stop sign simply because I forgot it and wasn't going to rerender just because of that. PITA... but looks alright. I brightened some areas, grittied up some other areas, etc. to my liking.

The Asian lady... I think she's a tourist...

here is what I started with. of course these would be hi res png's with no background but to show what I mean regarding the periphery, I shaded the edges of the existing photo green, so that you can see that it and the rendered output are the same. 

before.jpg 

after.jpg 



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arqcova

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Reply with quote  #7 

Nice tutorial and explanation! I tried once to make a photo matching, the problem was the "source" material, I needed to show the building, and the client provides me a lot of different photos with different locations each one, so the perspective was a mess for starters, and added to the complexity for me was the requirements of disappearing the cables and the front tree...

yours is truly a nice example of good planning and good execution!


My tryout (a lot of room for improvement, I know)
01.JPG  02.JPG  Dave5.jpg 



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jlo

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Reply with quote  #8 
Thanks for putting up the tutorial. I recommend putting it into the tip/help section as well! i cant remember if i tried to use the photo-output from sketchup for the background but i had a difficult time getting mine to match perfect so maybe i didnt and you have the right technique and process. I definitely want to retry it now using this process...
i like the stop sign and wires from the original picture (better than rendering it). it adds layers to everything that makes it more realistic. Its also very cool that the geolocation so accurately represented reality. That's also kudos to the boys at sketchup/trimble for that! 

And now that you said all that and i scrutinized this for way too long, you missed some tree shadows on the far left of the model [wink]

jlo

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Reply with quote  #9 
Arq, yours seems solid as well. I do notice that the windows have no frames which bothers me and maybe try adding a hair of blur to blend with the photo better. The overall lighting seems to change from the original photos to maybe a greenish tint? i can't really tell but it's different in a bit of an unnatural way. Maybe its that you are trying to force the blue skies in a grey colored original picture or maybe oversaturated...i can't tell exactly but something... 
atrodler

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Reply with quote  #10 
Missing shadows! Are you kidding me! You mean the shadows that show up on the garage? Yeah ok. Ya got me. The shadows on the ground in that same vicinity are actually from a passing pickup truck just visible in the photo.

You’re killing me! 😎

Arqcova! Nice one considering the mess you had to edit out. Way to go! What catches my eye is the sky. As utopian as we’d like to be, a nice sunny day is always on the menu but I would have stayed true to the image and matched the sky. Thanks for sharing.


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arqcova

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Reply with quote  #11 
Yeah I know! the next one would be better I hope!
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jlo

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Reply with quote  #12 
I'm just goofin, I think it's perfect even with the missing shadows. it would certainly be in my portfolio with a pre and post results merged into one image.   To arq, on a side note since we covered the grey and blue skies - I did add a Lem and colored it to 12k kelvin from that script (instead of white) to add some sun in a deep interior shot with fairly satisfying results. fyi...
I have to post some of those renders up from that project...
arqcova

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Reply with quote  #13 

noted! and I kept the script in my podium folder! thanks for that!

LightTemp_2_RGB_byJLO


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atrodler

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Reply with quote  #14 
Looking at arqcova's image reminded me of something else that may be causing some of the alignment problems people are running into when attempting to execute photo matching (arqcova, this is not a knock on the quality of your workmanship by any means. I just noticed the same scenario I once encountered so your contribution fit the explanation).

When modeling to a matched photo you have to remain within the confines of the photo you are using. At least for podium renders, which is the focus here. Podium snaps back to the match photo viewpoint and then renders. Of course once you try to adjust the camera to bring the entire model into view , here begins the separation of FOV, alignment, perspective, etc. between images and the beginning of the alignment nightmare later on in PP. 

If you have a model that will extend beyond the confines of the existing photo, in order to have a before and after image that aligns perfectly, you'll first need to adjust, or "grow" the boundaries of the photo you are going to match. 

For example using arqcova's images. 

This:
arqcova.jpg 
Becomes this, with a little editing of my own to remove the wires, and hey look there's a tree in the foreground... that saved me a lot of editing. (no not the same species... I know)
arqcova 2a.jpg 
which produces this... obviously cutting off the top of the proposed addition. We can continue to work on it here in PP and eventually get it but as we all know, that is a huge headache. 
arqcova 3a.jpg 
So, we go back to the first image. I stitched the two images arqcova posted together using MS ICE and the gave myself even a little more room on top, just to be sure, to get this, edited: yes I advocated for a more overcast sky earlier on, but still had to add a hint... just hint. 
arqcova 2.jpg    
for this as a final:
arqcova 4.jpg 
I know there are all the other proposed items that I simply left out for this exercise but the proportion and perspective for both the before and after image is the same. All images were cut (rendered) from the same model scene. Maybe this well help some with the photo matching alignment next time around. I realize the differences appear minor when compared to all this explanation but taking the time to get the model set up where it will work best for you, will save a whole lot of time, effort , and guess work later.  



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"adopt the pace of nature: her secret is patience." 
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arqcova

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Reply with quote  #15 
Thanks for taking the time for the explanation!

I will be using all the tips for my next photo-matching!

by the way, I needed to make a research about MS ICE  amazing tool! It would help a lot in this type of works! Thanks for sharing! 

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