TLK and dif shadows from dts

I'm using TGE 1.4 with TLK.

2 questions:

When I cast shadows from a dts to a dif, the shadows seem very faint and blury, like a very low resolution shadow map.
I experimented using the ../shapes/lightingPack/pipesupport.dts as the object to cast shadow from.
Dif is an interior I created from 3DWStudio and exported using map2dif_plus.exe

The same pipesupport.dts cast a nice and dark shadow on the TLP's dif (../interiors/lightingPack/demo4.dif)

Both using the same TLK light blocks.

What am I missing? How do I get nice dark shadows cast from .dts to dif?



Secondly:
In the TLK modellersGuide.pds, it says:

TLK Entities
TLK adds a new entity type to map2dif called sgLightingScaleEntity, which is a brush entity
(similar to the portal entity, it's applied to a brush) that changes the brush's light mapping
scale (how large or small its light maps are) and can add self-illumination to the brush.
Changing the lighting scale per-brush can place as much or as little lighting detail right where
it's needed. For instance, to place a highly detailed brush right where a shadow falls, or a
very low detail brush where no lighting is visible.

Can someone explain how to setup this sgLightingScaleEntity? Is it an entity I place in 3DWS or any map editor apps?

Thanks