[VISUAL] Shadows created by an env_global_light entity, and casted on textures using "sdk_" shaders and $envmap, will always look sharp

[HoneyfrostStudio]

Describe the bug

When a shadow emitted by env_global_light is projected onto a textured floor using a shader that has the prexif "sdk_" in the name (for instance: sdk_LightmappedGeneric), the shadow is not subject to the "shadowfiltersize" parameter.
It will always look very sharp, whatever the value of shadowfiltersize.

Steps to reproduce

Steps to reproduce the behavior:

1. Place an env_global_light entity to your level
2. Create a floor using a texture that has the prefix "sdk_" in the shader's name + the $envmap parameter
3. Observe

Media