when doing a render need help for back ground images

chris_settlemoir

when i do a render i always put in a  hdr setting it always shows a cloud in the window or something is there anything i can use or any product recomendation that i can buy to put in the back for buildings or out side shots g that  would be useful for the windows i dont want  the windows to be grayed out because their is no back ground in the back ground other then the building ect

chris_settlemoir

can anyone help?

Richard Haseltine

chris_settlemoir said:

can anyone help?

Please give people time to reply, and don't bump posts.

chris_settlemoir said:

when i do a render i always put in a  hdr setting it always shows a cloud in the window or something is there anything i can use or any product recomendation that i can buy to put in the back for buildings or out side shots g that  would be useful for the windows i dont want  the windows to be grayed out because their is no back ground in the back ground other then the building ect

I think you mean you are rendering the dome, which be default is a fairly small and so blurry HDRI image. If you want a wider choice look at alternative HDRI maps (there are several sets in the store, and a thread in the Freebies forum  - I think - listing free sources). You could also render without a visible dome, save as png or tiff so that you preserved the alpha channel, and use that to composite over the backdrop of your choice.

If, on the other hand, the issue is seeing through a building model that is only a frontage, try putting a cube or a part-cube made of planes (Create>New Primitive) behind the window to block the sight-line.

 

mjc1016

The link to the Freebie thread is in my sig...

Greg Zaal has a sample pack of 5 full resolution (16K) images at the HDRIHaven link that are suitable for both lighting AND backdrop usage.  There are some at NoEmotion that are also high enough resolution for backdrop usage.   Both allow commercial usage of the renders.  Aversis has large resolution ones, but they are non-commercial use only. 

A general rule of thumb...8k pixels and up (on the long axis/width) are usable for both lighting and backdrop.  The 4k to 8k range MAY be usable for both, depending on the subject matter (pure skies are probably fine as low as 4k).  Under 4k are pretty much just usable for lighting only.