Match the shadowcacher shadow to the background shadow

[n2graf]

Hey I can't get the shadow catcher's shadow to be the same color and darkness as the backplate shadow. In this case I have used a 360 image from google maps as hdri, I aded only two containers (all the other thinks are background) and I have added a sun corona to increase the intensity of the sun at which the 360 ​​texture does not reach. Incresing the shadow amount its not enought, at the imatge is at 10. If I increase the intensity of the sun, the shadow is darker but I have to lower the exposure in the tonemapping, and strangely when under the exposure, the shadow becomes lighter instead of going down as well. As you see, the container shadow also has a different bluish color than the shadow of the railing that belongs to the image background. I suspect it is because it mixes with the diffuse of the ground that is more reddish but I cannot apply diffuse to the shadowcacher material. How can I touch the color of the shadow?

Another option is to do it in post-production, but I can't find any pass to extract only the background, which would be very good for situations where the background itself has objects that would be in front of the container partially covering it and would need to mask the container in photoshop and show the background, so using the beauty alpha would not work.

thanks!

[romullus]

Using panoramic image from google street view as enviroment light is bad idea. It's just a LDR image and is giving you completely incorrect lighting. You would get much better results by swapping it with Corona sky, or some proper HDR panoramic image. When setup will be correct, you likely won't need to boost shadowcatcher's shadow intensity, as it will be of right darkness from get go.

[n2graf]

I know that using LDR is a bad idea but its the most similar to reality option. So the pixels of the 360 are emiting light and when this light is superior 0-1 range the 360 is clamped but i put the corona sun to solve it. If i use corona sky i have the same light at everywhere and its not like in the real scene is. So im searching the best workflow to use any googlemaps 360 photo in any site of the world. I know that never will be like reality without HDR but i want to aproximate it with diferent tecniks.

The problem is that i dont know how can i make the shadow darker and change his color withou going to another program like photoshop. Thanks!