I am fairly new to the Vue renderer but have been using Luxology a lot. I often use it for photomontages and it is not unusual that the images I have to work with are cloudy with low contrasts like the picture below. To match that light in the rendered building I use to set high Cloudiness. But when I do that in Vue it does not affect the rendering, neither does Solar Intensity. Is there some other setting blocking these settings?
Did you try changing the atmosphere to something cloudy like Coming Storm? I would try ray tracing this scene using Coming Storm. You could also open the Atmosphere Editor and boost the Skylight Gain to 10 or higher. Try changing its color to a mid-gray as well, this in effect would illuminate the scene more from the cloudy sky than the sun. Boosting skylight gain does not work with the path tracer.
I went back to see if I could come up with a way to use the path tracer to render a scene that is overcast, while the ray tracer worked as I suspected it would it was much slower to render. I have some settings for you to try.
In the above ray-traced rendering you can see it does look like an overcast day.
In the above render, the same settings using the path tracer, and it sure looks like a sunny day!
I made the following changes to the Solar Settings in Light Manager:
Change the Color Type to User Defined then change the color to dark gray RGB 64,64,64 you can experiment with this to get the result you are after.
I also changed the Spread Angle to 5 to soften the shadows and reduced the shadow density to 40%.
Below is the path traced rendering:
Not sure why VUE is not getting the solar intensity setting but darkening the solar color has a similar effect. The ray trace took a little over an hour to render whereas the path tracer took less than 3 minutes.
Hope this helps.
I have been laborating with these settings and getting good results, thanks! To make the Photoshop workflow easier I would like to set a blank background in the rendered image. I noticed there are some backround settings in the Post Render Settings, but they are greyed out, do you happen to know why?
It doesnt look like a background image is being used which should explain why the settings are greyed out.
Some more info available in the help:
This a bug and there is a TR for it, we always render an alpha channel so this should work. Currently, to add a background you have to set the atmosphere to none when you render then the option is available however you lose the atmospheric sky lighting. Because we always render an alpha you can save the render to a file and use the alpha channel to add a background in an image editor such as Photoshop, Gimp Etc.
This should be fixed in the next release.