Seems to be an issue with the light maps.
Looking into the cache/thing_lm folder inside the bronze doors zip-file shows that several of them are >1MB and all of them together sum up to ~ 36.2MB.
I didn't find any easy way to resize cslighter lightmaps as of yet.
Edit: changing the MaxTextureSize didn't really fix it (after longer testing). I will test further.
however uncommenting the MaxTextureSize in the r3dopengl.cfg file (setting it to 1024) solved the issue for me.
However, this can only be a temporal fix.
file: ./data/config/r3dopengl.cfg
Video.OpenGL.Caps.MaxTextureSize = 1024
Try this value first, if it doesn't really help, you may also change it to 512. However, 1024 worked perfectly for me.Sidenote: This doesn't work for Hydlaa (or other lighter2 maps, since this value doesn't affect the size of ligher2 light maps)
If you have issues with hydlaa_plaza, hydlaa_jayose or ojaveda, you may want to try those inofficial maps (which have rescaled light maps):
http://wol.pilum.net/smf/index.php/topic,75.0.htmlHowever, please note that this isn't a long-term fix.