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test composites

Posted: Sun Jan 05, 2014 7:58 am
by MaTtY631990
Hello, long time octaneers. A couple of composite still trials using HDRI lighting, Comments and critique are welcome. Hope you like. More trials coming.
forest_composite.jpg
night_composite.jpg

Re: test composites

Posted: Sun Jan 05, 2014 3:18 pm
by Tugpsx
Nice job, what did you use on the tires in the forest lane HDRI it looks like they picked up the dirt from the road. Was that intentional or happy accident?
Thanks for sharing

Re: test composites

Posted: Sun Jan 05, 2014 5:45 pm
by MaTtY631990
The tires were actually simple material. The floor color was picked from the dirt road to match which helped reflect on the model and slight post work in photoshop to lift gamma helped simulate it.

Re: test composites

Posted: Mon Jan 06, 2014 2:28 am
by vedushi
Hey nice work! It looks great. What did you use for lighting and creating such a nice shadow?

Im using a Hdri and hit the "Imp. Samples" for creating shadows on the plane but it doesn't look good and its to transparent. How do you did that?

cheers!

Re: test composites

Posted: Mon Jan 06, 2014 5:48 am
by MaTtY631990
I used a hdri that matches with background for lighting scene. Try set gamma value to 1 for you environment map and render setting gamma value to 2.2 and tweaking exposure to get right balance. Also for ground plane I color picked from background picture to get a similar color and adjusted the brightness to match photo. Don't worry if it still looks transparent in render window, looks different once you composite final images in post application.

Hope this helps.

Re: test composites

Posted: Mon Jan 06, 2014 1:36 pm
by MaTtY631990
Another one
tunnel_composite.jpg

Re: test composites

Posted: Mon Jan 06, 2014 3:15 pm
by Tugpsx
Arrrgggg! you beat me to it. LOL nice placement of the shadow catcher to allow for shadow on the bars. I was questioning in mine if shadow would bend or project through. I see you decided it would bend.
But great job anyway. Thanks for sharing.

Looks like you used a meshlight for the bulbs close to the bike. Did you use sILBs option to calculate the wattage or just winged it.

Re: test composites

Posted: Mon Jan 06, 2014 4:49 pm
by MaTtY631990
Thanks for the comments. Light emission comes directly from hdri map only. Just the map, no mesh lights. Also I think the shadow projection on the bars work quite well and do seem correct.

Re: test composites

Posted: Mon Jan 06, 2014 7:11 pm
by Tugpsx
Do you mind posting your environment settings. Here is the test but there is a light-plane casting the shadow since if I recall HDRI don't cast shadows, reflections yes but shadows no.
I like your dust layer too was that done in post.
Quick bike test
Quick bike test

Re: test composites

Posted: Mon Jan 06, 2014 7:34 pm
by kavorka
Tugpsx wrote:Do you mind posting your environment settings. Here is the test but there is a light-plane casting the shadow since if I recall HDRI don't cast shadows, reflections yes but shadows no.
I like your dust layer too was that done in post.
BikeCapture.JPG

HDRI will cast shadows. It depends on the HDRI, most of them have very soft lighting, so the shadows are soft, not crisp.