Well first you should read the suggestion that it gives. It tells you to use -relight. Do that first.
Also does your level have exterior walls with z-fill set? Note that CS by default doesn't clear the screen or z-buffer every frame. So the contents of the previous frame will remain visible unless you clear it somehow (usually with exterior walls).
Greetings,
the export map code from 3ds max which use planshift is following:
<world>
<variables>
<variable name="lightning reset"><color red="0" green="0" blue="0"/></variable>
<variable name="LodM" value="-0.00666667" /><variable name="LodA" value="1.33333" />
</variables>
<textures>
<texture name="spark.png"> <file>spark.png</file></texture>
</textures>
<materials>
<material name="spark.png"> <texture>spark.png</texture></material>
</materials>
<plugins>
<plugin name="thing">crystalspace.mesh.loader.thing</plugin>
<plugin name="thingFact">crystalspace.mesh.loader.factory.thing</plugin>
<plugin name="meshFact">crystalspace.mesh.loader.factory.genmesh</plugin>
<plugin name="mesh">crystalspace.mesh.loader.genmesh</plugin>
</plugins>
<settings><clearzbuf>yes</clearzbuf><lightmapcellsize>32</lightmapcellsize></settings>
<sector name="lightroom">
<cullerp>crystalspace.culling.dynavis</cullerp>
<meshobj name="wall">
<plugin>thing</plugin>
<priority>object</priority>
<zuse />
<params>
<v x="9.39086" y="0.0" z="6.19289" />
<v x="-9.89848" y="0.0" z="6.19289" />
<v x="-9.89848" y="0.0" z="-10.5584" />
<v x="9.39086" y="0.0" z="-10.5584" />
<v x="9.39086" y="8.0" z="6.19289" />
<v x="-9.89848" y="8.0" z="6.19289" />
<v x="-9.89848" y="8.0" z="-10.5584" />
<v x="9.39086" y="8.0" z="-10.5584" />
<v x="9.09087" y="0.0" z="-10.2584" />
<v x="-9.59848" y="0.0" z="-10.2584" />
<v x="-9.59848" y="0.0" z="5.8929" />
<v x="9.09087" y="0.0" z="5.8929" />
<v x="9.09087" y="8.0" z="-10.2584" />
<v x="-9.59848" y="8.0" z="-10.2584" />
<v x="-9.59848" y="8.0" z="5.8929" />
<v x="9.09087" y="8.0" z="5.8929" />
<material>spark.png</material>
<p name="wall_1"> <v>5</v><v>1</v><v>0</v><v>4</v>
<texmap><uv idx="0" u="0.267606" v="0.0" /><uv idx="1" u="0.267606" v="1.0" /><uv idx="2" u="0.0" v="1.0" /></texmap></p>
<p name="wall_3"> <v>6</v><v>2</v><v>1</v><v>5</v>
<texmap><uv idx="0" u="0.5" v="0.0" /><uv idx="1" u="0.5" v="1.0" /><uv idx="2" u="0.267606" v="1.0" /></texmap></p>
<p name="wall_5"> <v>7</v><v>3</v><v>2</v><v>6</v>
<texmap><uv idx="0" u="0.767606" v="0.0" /><uv idx="1" u="0.767606" v="1.0" /><uv idx="2" u="0.5" v="1.0" /></texmap></p>
<p name="wall_7"> <v>4</v><v>0</v><v>3</v><v>7</v>
<texmap><uv idx="0" u="1.0" v="0.0" /><uv idx="1" u="1.0" v="1.0" /><uv idx="2" u="0.767606" v="1.0" /></texmap></p>
<p name="wall_9"> <v>13</v><v>9</v><v>8</v><v>12</v>
<texmap><uv idx="0" u="0.268212" v="0.0" /><uv idx="1" u="0.268212" v="1.0" /><uv idx="2" u="0.0" v="1.0" /></texmap></p>
<p name="wall_11"> <v>14</v><v>10</v><v>9</v><v>13</v>
<texmap><uv idx="0" u="0.5" v="0.0" /><uv idx="1" u="0.5" v="1.0" /><uv idx="2" u="0.268212" v="1.0" /></texmap></p>
<p name="wall_13"> <v>15</v><v>11</v><v>10</v><v>14</v>
<texmap><uv idx="0" u="0.768212" v="0.0" /><uv idx="1" u="0.768212" v="1.0" /><uv idx="2" u="0.5" v="1.0" /></texmap></p>
<p name="wall_15"> <v>12</v><v>8</v><v>11</v><v>15</v>
<texmap><uv idx="0" u="1.0" v="0.0" /><uv idx="1" u="1.0" v="1.0" /><uv idx="2" u="0.768212" v="1.0" /></texmap></p>
<p name="wall_17"> <v>11</v><v>8</v><v>0</v>
<texmap><uv idx="0" u="0.984447" v="0.017909" /><uv idx="1" u="0.984447" v="0.982091" /><uv idx="2" u="1.0" v="0.0" /></texmap>
</p>
<p name="wall_18"> <v>3</v><v>0</v><v>8</v>
<texmap><uv idx="0" u="1.0" v="1.0" /><uv idx="1" u="1.0" v="0.0" /><uv idx="2" u="0.984447" v="0.982091" /></texmap>
</p>
<p name="wall_19"> <v>2</v><v>3</v><v>8</v>
<texmap><uv idx="0" u="0.0" v="1.0" /><uv idx="1" u="1.0" v="1.0" /><uv idx="2" u="0.984447" v="0.982091" /></texmap>
</p>
<p name="wall_20"> <v>2</v><v>8</v><v>9</v>
<texmap><uv idx="0" u="0.0" v="1.0" /><uv idx="1" u="0.984447" v="0.982091" /><uv idx="2" u="0.0155526" v="0.982091" /></texmap>
</p>
<p name="wall_21"> <v>1</v><v>2</v><v>9</v>
<texmap><uv idx="0" u="0.0" v="0.0" /><uv idx="1" u="0.0" v="1.0" /><uv idx="2" u="0.0155526" v="0.982091" /></texmap>
</p>
<p name="wall_22"> <v>1</v><v>9</v><v>10</v>
<texmap><uv idx="0" u="0.0" v="0.0" /><uv idx="1" u="0.0155526" v="0.982091" /><uv idx="2" u="0.0155526" v="0.017909" /></texmap>
</p>
<p name="wall_23"> <v>0</v><v>1</v><v>10</v>
<texmap><uv idx="0" u="1.0" v="0.0" /><uv idx="1" u="0.0" v="0.0" /><uv idx="2" u="0.0155526" v="0.017909" /></texmap>
</p>
<p name="wall_24"> <v>0</v><v>10</v><v>11</v>
<texmap><uv idx="0" u="1.0" v="0.0" /><uv idx="1" u="0.0155526" v="0.017909" /><uv idx="2" u="0.984447" v="0.017909" /></texmap>
</p>
<p name="wall_25"> <v>15</v><v>4</v><v>12</v>
<texmap><uv idx="0" u="0.984447" v="0.017909" /><uv idx="1" u="1.0" v="0.0" /><uv idx="2" u="0.984447" v="0.982091" /></texmap>
</p>
<p name="wall_26"> <v>7</v><v>12</v><v>4</v>
<texmap><uv idx="0" u="1.0" v="1.0" /><uv idx="1" u="0.984447" v="0.982091" /><uv idx="2" u="1.0" v="0.0" /></texmap>
</p>
<p name="wall_27"> <v>6</v><v>12</v><v>7</v>
<texmap><uv idx="0" u="0.0" v="1.0" /><uv idx="1" u="0.984447" v="0.982091" /><uv idx="2" u="1.0" v="1.0" /></texmap>
</p>
<p name="wall_28"> <v>6</v><v>13</v><v>12</v>
<texmap><uv idx="0" u="0.0" v="1.0" /><uv idx="1" u="0.0155526" v="0.982091" /><uv idx="2" u="0.984447" v="0.982091" /></texmap>
</p>
<p name="wall_29"> <v>5</v><v>13</v><v>6</v>
<texmap><uv idx="0" u="0.0" v="0.0" /><uv idx="1" u="0.0155526" v="0.982091" /><uv idx="2" u="0.0" v="1.0" /></texmap>
</p>
<p name="wall_30"> <v>5</v><v>14</v><v>13</v>
<texmap><uv idx="0" u="0.0" v="0.0" /><uv idx="1" u="0.0155526" v="0.017909" /><uv idx="2" u="0.0155526" v="0.982091" /></texmap>
</p>
<p name="wall_31"> <v>4</v><v>14</v><v>5</v>
<texmap><uv idx="0" u="1.0" v="0.0" /><uv idx="1" u="0.0155526" v="0.017909" /><uv idx="2" u="0.0" v="0.0" /></texmap>
</p>
<p name="wall_32"> <v>4</v><v>15</v><v>14</v>
<texmap><uv idx="0" u="1.0" v="0.0" /><uv idx="1" u="0.984447" v="0.017909" /><uv idx="2" u="0.0155526" v="0.017909" /></texmap>
</p>
</params>
</meshobj>
<light name="Omni01lightroom">
<attenuation>none</attenuation>
<center x="-6.95431" y="7.91878" z="-3.46141e-007" />
<radius>20.0</radius>
<color red="1.0" green="1.0" blue="1.0" />
</light>
<light name="Omni02lightroom">
<attenuation>none</attenuation>
<center x="5.63452" y="7.81726" z="-3.41703e-007" />
<radius>20.0</radius>
<color red="1.0" green="1.0" blue="1.0" />
</light>
<light name="Omni03lightroom">
<attenuation>none</attenuation>
<center x="-7.45127" y="0.510895" z="0.0" />
<radius>20.0</radius>
<color red="1.0" green="1.0" blue="1.0" />
</light>
</sector>
<start name="Camera01"><sector>lightroom</sector><position x="-0.385156" y="2.33503" z="-3.93789" /></start>
<sequences>
</sequences>
<triggers>
</triggers>
</world>