Have same issue anytime I'm near hostages. these are the error codes that show up when I load CS source
Requesting texture value from var "$basetexture" which is not a texture value (material: dev/bloomadd)
Requesting texture value from var "$basetexture" which is not a texture value (material: dev/no_pixel_write)
Requesting texture value from var "$basetexture" which is not a texture value (material: dev/lumcompar