Now for Rendering a Car in Scene
It’s all the same basics (good environment with lightning system that’s consistent with it).
You can basically just put an HDRI to be used for the reflection environment and sky light but shadows are too soft if you depend on the HDRI alone.So you can just put light sources similar to the HDRI has to supplement it. Basically an omni or vray light placed in the scene to supplement the sun in the HDRI image.
For positioning light you can just put the HDRI image as visible in the viewport (just click alt+b and place it there as instance) and to get the exact position of the light as the sun in the HDRI to give you more powerful lightning and sharper shoadows, use a test sphere.
Just place a reflecting sphere and the HDRI as background, render an image as you will see the light isn't exactly positioned to be instead of the sun in the HDRI, move the light until you have the exact position of the light as the sun.
Now after you have the light position of the sun and HDRI, start changing with the parameters until you have something you like
Add few lights if you needed to complete the lightning in some of the dark areas which increasing the GI would be costly to reach (for example underneath the car, or if you wanted to increase the lightning in front of the car, just place a light in front of it)
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