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mer photos
djellison
post Mar 4 2012, 10:36 PM
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Actually - you could put the rover at almost any angle you wanted within a panorama - you just have to put it in the right place to match that angle (or vice versa) . As for resolution - yes, the Pancam images are low res compared to what you're doing....so you just render at a resolution to match the background.

This has been done before : http://marsrovers.jpl.nasa.gov/gallery/spe...Effects/spirit/ and http://marsrovers.jpl.nasa.gov/gallery/spe...ts/opportunity/

This is where experience really kicks in - you need to start rendering multiple passes - a shadow pass, an AO pass, a diffuse pass etc etc - then you recomp them all together in post.

I can totally understand if you don't want to go to all that effort - but that doesn't mean it's not possible.
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scooterlord
post Mar 4 2012, 11:09 PM
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I have done several successful photo integrations in the past:

http://scooterlord.gr/newours/images/fiat.jpg
http://scooterlord.gr/newours/images/honda.jpg

..the problem with the spirit is that the file IS HUGE to manipulate. I have already created hdri for the lighting/illumination/reflection from panoramas found on the web, but the faceplates I can create aren't the ones I am looking for. It would take a lot of trial and error to make it look nice and considering that the file takes about 3-4 minutes just to start rendering, it's a no-go. Let alone that in the resolutions I am aiming at, besides the passes (just 2 actually, one normal one without the ground + shadow map and one shadow map only with ground) it would need a lot of photoshop in order to make the shadow drop correctly on the bumpy ground.. and I don't even want to think rendering for 60 hours and then the angle doesn't match precisely for 5 degrees...

..trust me, I have my reasons to model my own, just wait and see biggrin.gif


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scooterlord
post Mar 5 2012, 12:39 AM
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heh... I think it will come out nicely... I found a way to randomly rotate and place rocks on a surface, here is a test render:



..it's just a RANDOM surface (which is too bumpy for my taste for the final render), with a quick texture and a plain black texture with a bump for the rocks, and atmosphere is not set at all.... so, it's just a random test, but thought I'd share. Comments welcome as always!

Anyway, its 3am here, tomorrow I'llbe leaving for Italy where I'll spent my whole week, I'll leave the pc to render stuff here, but I can't promise I'll be able to post till next week biggrin.gif


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scooterlord
post Mar 10 2012, 10:08 PM
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Hello everyone,

back from my trip to Rome and back to my normal life. Here is a new render for your pleasure. edit: Click for high resolution render as usual



A new one is coming soon, this time at resolution 5400x3038 from an angle looking at its side, I'll let it render until tomorrow before I post, it has already been rendering for 86 hours...


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pospa
post Mar 11 2012, 09:03 AM
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Hi Nick, its beautiful as usually - real joy to observe whole upper deck in such a sharp details.

Q: on the righr front solar panel, near the outer joint to right rear panel, there is white piece of some wire connection to photovoltaic cells that is a few mm above them in the air, throwing shadow. Is this on purpose or just some remnant?
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scooterlord
post Mar 11 2012, 10:18 AM
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Yup, my bad.. Theres always something that escapes your attention. I'll have that fixed sonetime latee


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scooterlord
post Mar 11 2012, 11:56 AM
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New MONSTER render (5400x3038)! As always click for the huge render and let it load... 3mb in size



Still expecting your comments! I am glad that people look at it so thoroughly and still find errors smile.gif In that beautiful render looking from under the wings, there are a couple of errors, will have them soon fixed as well, the render was SO beautiful that I assume most of you were left out of mind to look for the errors, hehe smile.gif

I think most of you will be pleased with the next render to come...


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scooterlord
post Mar 11 2012, 03:10 PM
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Well, this took less than I imagined... I hope many will be pleased with this one, so I want to hear about it! smile.gif Click for a high resolution dirty rover wink.gif



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paxdan
post Mar 11 2012, 03:22 PM
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Stunning, a triumph! ILM or Weta digital would be proud of this. It is an amazing piece of work and clearly a labour of love.

Edit: What is so evocative is that this is a astronaut's eye view of what coming face to face with the rover on the surface of mars would look like.
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djellison
post Mar 11 2012, 05:55 PM
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So the only problem with the rover on the Spirit panorama is the shadowing. You're still rendering it like it's in a big open room with loads of lighting etc etc. On Mars there are two lighting sources... the sun (and because we're at 1.5AU, shadows are a little sharper) and the diffuse illumination from the sky (which backfills the shadows and is the main source of the beige tint to everything). You need to get those shadows right to make the rover look like it belongs on the surface.

Take your cue from the few rocks big enough to be casting shadows on that image.


Also - you have the wheels being quite shiny and reflective. They have a slight, very diffuse specularity to them, but almost no reflectivity. I'd dump the reflectivity all together and just have a specularity - you'll save some render time at the same time.
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scooterlord
post Mar 11 2012, 06:07 PM
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..well you are a very strict judge, but.. I kinda like it; I must be a masochist of some sort. I just reviewed the panorama again, and seems like the lighting actually casts sharp shadows.

I used this kind of lighting in purpose, because when the air is full of particles, the light source does not hit the item directly, thus causing this shadow effect and not sharp shadows. Upon closer look, you are right, I'll fix this shortly. Improving sounds nice. You sound like a very difficult client! hehe


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djellison
post Mar 11 2012, 06:13 PM
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QUOTE (scooterlord @ Mar 11 2012, 10:07 AM) *
You sound like a very difficult client! hehe


Having worked in the industry for 12 years....I can tell you - there is no other kind. I'm giving you the hardest time I can, because that's the most appropriate and realistic feedback to get...honestly smile.gif

These shadows - http://www.unmannedspaceflight.com/index.p...st&id=26549 - are a little soft, because it's late in the day. Most large color pans are taken between about 11am and 2pm - so near 'noon' like lighting. Bright, sharp etc. Basically, you need to balance that sun light and the backfill diffuse dusting light to get both the right total brightness AND contrast between the illuminated parts and shadowed parts. It'll make you cry to see all your amazing rover electronics box stuff get hidden into shadow, but that's where it's going to end up unless you do late in the day images.


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scooterlord
post Mar 11 2012, 06:16 PM
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Since this background I used is part of a bigger panorama picture, I found the sun's location. I will render just a shadow render and put it on top of my current render. As for color balance, etc, these I post-process in photoshop. Will get back later on with a new version.


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Pando
post Mar 11 2012, 09:06 PM
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Awesome work scooterlord...

Now that you're actually rendering it in a real environment, consider rotating the wheels in random directions. It's just one of those things (among many others) that help with realism.
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scooterlord
post Mar 11 2012, 09:21 PM
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Ok, will do so in the next renders... taking ages to control this beast. It's been rendering just the shadow channel for the past 2,5 hours and it's still grainy...


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