Howdy!. I'm trying to reproduce a shading effect as it can be seen in the attached picture.

The thing which confuses me is How can I blend the shading effect from two directions?. The problem arises in the lower corner.

I can reproduce the gradient effect in the vertical column seen in the left, and the one which is in the bottom. But when I put the two together they overlap those together and it doesn't look as good as in the example. In other words they do not blend transitioning from one direction (the vertical one and the horizontal) as in example figure which I'm trying to reproduce.

The corner also looks that the transition is rounded and not acute or right, does it exist a way to do this?

How can I achieve that effect. Can someone help me?.

I've read different tutorials on working with gradients but I haven't found one which could help me with this problem. Can someone explain this with detailed steps so I can reproduce this easily?.

Help please?.

In this case, I'd just use a filter.

I´d try mesh-gradient:

BTW: your spring outline is segmented.

@TylerDurden  Can you tell me what sort of filter are you referring to?. I tried Drop shadow and then Gaussian blur to try to recreate the effect but it did not yielded better results. And it is difficult to control. I'm still a novice in this. Using filter and feather blur does have the backside that the result object is bigger than the original and it cannot be trimmed properly, there's also the question of how to remove what's inside?. I tried using clip with an added frame but this does only hides the inner part and this isn't exactly what I was intending to ask. There's also the part on how do you add the interior outline in the L?. Does it needs to be added by drawing it by hand using bezier tool?. Does it exist a better tool?.

@PixelPest Does it exist a better way to do it?. In the example the effect is made with 000000 as color but would it work with other colors as well or will it blend with 000000(black).? I'm still a novice with Inkscape. The gif video is good but can you add a writen version of this. I didn't understood your comment about outline to be segmented. My Inkscape version is 0.91 are those mentioned tools available in that version?. The part where I'm stuck is how do I add the stroke to the object you have just created?. I mean the end result is just the fill but if I add stroke i.e A9A9A9 (hexadecimal color) it will follow all the corners isn't it?. But I need the stroke only in the inner part of the L. How can I do that?. Help please?.