Renamed the screenStartRadius and screenEndRadius properties in the bulletHoleDecal datablock and ScorchRXDecal datablock to fadeStartPixelSize and fadeEndPixelSize properties, respectively, to match names of the properties as defined in the decalData.cpp file, as noted in issue #1498
Among other possible fixes, this makes the size of the bullet hole decal's actually random in size now, instead of always being the exact same size.
@AlexBarys
This makes some tweaks to the engine to support this, specifically, it tweaks the hardcoded shaderpaths to defer to a pref variable, so none of the shader paths are hardcoded.
Also tweaks how post effects read in texture files, removing a bizzare filepath interpretation choice, where if the file path didn't start with "/" it forcefully appended the script's file path. This made it impossible to have images not in the same dir as the script file defining the post effect.
This was changed and the existing template's post effects tweaked for now to just add "./" to those few paths impacted, as well as the perf vars to support the non-hardcoded shader paths in the engine.
