Im like lost with lighting.  How do I get rid of those shadowy parts?  I even set the shadow to 0 but didn't work.  

We're going to need more information than just the image. What render engine are you using? Firefly or Superfly? What do the shaders look like? A screenshot of the material room's advanced tab would help.

At first glance, I'm guessing you're using firefly and you have one of the settings too low, but that is a guess, and I couldn't tell you which one without seeing your settings.

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shaders?  whats that?

Here are more firefly images.

lakes123 posted at 8:48 AM Sun, 30 October 2022 - #4447941

shaders?  whats that?

A shader is what lets Poser know how to render an object.
Example:

The left part shows the shader of the sphere

One thing that could help us help you is how the door, the wall are setup, for example

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the above images I posted are the shaders of the wall.

Actually @lakes123, the images you posted above are the "renders" of the shaders you used.

What @Y-Phil would like to see is a screenshot of the "Material Room" setup like the screenshot he posted above, which will show exactly which shader nodes you used, such as the Albedo, Roughness, Metallic and Normal nodes he has connected to the main PhysicalSurace root node in his setup.

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It's IDL splotchies.

Try setting the Irradiance cache setting to around 35 and adding a very low intensity point light near where it's happening. In corners for instance...

More than likely materials will have nothing to do with it. But make sure that reflection light mult is off in your materials just in case. And no AO in the lights and materials. Global illumination has superior AO built in, adding light or mat AO will cause problems.

And use ray traced shadows not depth mapped on your shadow casting lights. Generally I find a setting of 0.350 min bias and 75 samples or thereabouts produces shadows with good edges and detail without starting to show self shadowing polygons too much. Increase the Indirect Light Quality to about 50 or higher if you haven't done so.

...or switch to rendering with Superfly. Which doesn't have this problem but has it's own set of gotchas...